So i decided to dedicate a week to each of the 3 forms of monk [ Dragon, Harmonious, Drunken ] and give them equal shots in my regular group consisting of a cleric, disciple, paladin, psionocist, bard, and me. 

My 2 hander of choice is currently a power blade staff of devastation.  My dual wielders are 2x fist wraps of striking.
By buffed strength and dex were 900 each.  I wear a full suit of ultra rare jagged armor with a total of +5 endurance regen.

General Conclusions 
Dragon
Strengths
Offensive stance is amazing, and easily the best of the 3 monks.  The two additional endurance attacks are the most damaging of the 3 monks, and the sundering/gouging dragon line does a lot of damage.

Tied with drunken overall for dps.  Mostly due to drunken with 45 sec cool down 4x thousand fist combo is pretty high dmg.
Has one attack they can self exploit, does pretty decent dmg too. 

Weakeness
No utility, no debuffs, no deffensive buffs, no taunts.  The only offensive stance that penalizes you by making you have 0 mitigation at 15-30, 5% mitigation at 30-49 and 10% mitigation at 50 (again these numbers might varry if you have better/worse gear)  Basicly you get hit harder then a very light caster even at 50. 

Harmonious
Strengths
Tons of debuffs (7 in total) and by far the most efficient soloer.  The full dps range should only be considered with the 15% mitigation debuff on the target, whithering palm self buff on, and in offensive stance.  At 50, with crit gear and dual wields, harmonious sit at roughly 75% crit rate. 

More attacks then drunken, same as dragon (dragon breath doesnt count its worthless).  Supprisingly more defensive-save-my-butt buffs then drunken.   

Most utility overall of all the monks, and probably the most fun to play imho.

Weakeness
Kinda lack luster, sure criting a lot is nice, i just felt let down because i didnt see the 20-30k crits i do on drunken and dragon.
Worst dps of all the monks, which is odd, this one should be middle ground, especially with the high crit rate, sadly though, the high crit rate means very little when  I would say the +30% crits is about equal to a +20% dmg bonus, which explains pretty well why drunken (22%) and dragon (24%) all do more dmg then harmonious. 

Has no attack they can self exploit... the worst of all the monks.

Drunken
Strengths
22% dps offensive stance, lots of defenisve oriented buffs (only 1 save my butt buff, the rest are counter attacks that function like big damage shields)  The best taunts in the game hands down, a drunken monk will never lose agro, even if doing 30 dps. 
Tied with dragon for top dps, mainly due to 22% dmg on the offensive stance, coupled with 4x thousand fist chain, which does kinda of bug me, personally i think all monks should get the 3rd hit, and drunken alone should get the 4th hit, i see no good reason why the drunkens should get 2 exclusive finishers, especially considering how horrible the dragons one is (divine tsunami)  I guess the fact that drunken have the fewest attacks makes up for it.

They also have 2 skills they can exploit on their own, the most of any monk, which is nice considering how few attacks they have

Weakeness
Fewest attacks and for the most part the attacks do the fewest damage.  The exceptions are the finishers all of the offensive ones are fairly high dmg, and the extra 2 thousand fists REALLY ups the overall dmg.   To me this felt more like the medium line monk, i could feel myself peeling more then harmonious from straight dps. 

Drunken has the offensive stance of dragon and the defensive stance of harmonious, doesnt really make sense to me. 

Great posts Fuj, but I was wondering, when were you last a drunken, because I just became one yesterday (my baby lvl 15 monk) and my offensive stance gives only 12% damage, not 22%.
Also, if soloing or duoing, what stance would you recomend to be in?  Should I always be in offensive and only go in to the defensive (+5% dodge, +5% parry but -10% Accuracy) if Im having to tank multiple mobs? Is the middle one worth using?

Thanks.  Im guessing the 10% acuracy is too harsh a penalty to use this stance for anything other than tanking (seems good against multiple mobs due to the damage part too)

Hate isn't an issue especially with jeering kick, but the loss of mitigation from means that offensive stance is painful, but definately worth using when soloing?
Would you spend more time in offensive or the middle stance when soloing or in a small group?

I didnt realise the stances improved, thats great to know, at lvl 15 the defensive Drunken Stance has a 10% accuracy penalty to it and its Damage Shield is about 23

Well, don't forget the proc rate which goes up by a little as well. I wouldn't mind a higher proc chance change through the levels, though.

Well it says at top what my group is. 

I averaged about 3k dps with dragon/drunken (dragon being just a bit higher, but once you do standard error it was negligable)  Harmonious wasnt far behind, only about 2.7k

All parses were done on crypt run in ToT, each form of monk got 5 days of atleast 3-5 crypt runs a day

Even worse, I am afraid, he's got bard..........

~QTM

Aye another thing i notice is that you have a PSI.

PSI with a Bard is a pretty Ubar combo, it means the Bard can maintain a higher DPS songs with less rest pauses in their song make up.

I think Fujitsus group of Cleric, Disciple, Paladin, Psionocist, Bard and Monk is pretty much the "Dream Team" I  can imagine your group was cutting through Mobs very fast.