I can't comment on the WF monk but I currently have a Horc and Drow monk at cap and I am also currently playing a Dwarven Monk and have him at 8th at the moment.
My Horc hits like a friggin tank and a Str of 40+ in fire stance IV is easily attainable. Heck...I am at 40 *before* I get raged and then Madstone on top takes it to 44 IIRC. Hard to beat those numbers...that would be a 40 in wind stance while raged and madstoned. Now the negative...he is a Shin III and his stuns land less regularly because of his lower Wis...only so many attribute points to go around. Don't get me wrong...they still land, but not nearly as frequently as my Drow monk with a 30 Wis.
Remember that Fire stance imparts a -2 penaly to Wis. That can be a big deal if you already have a less than stellar Wis. That being said...a WF in Fire gets an even greater penalty because they *start* at a -2 while the Horc gets his -2 in Int and Char. I know that you are planning a dark path monk but they still need Wis to get the most out of ToD so this is something that should not be overlooked.
The Dwarf is a blast to play so far. His stuns are pretty much automatic with a decent set of wraps and the tactics line. I don't have Earth III or IV yet because he is only 8th level but I'll bet he will break some major bones when he gets them. I am already hitting pretty hard. I currently switch between Fire and Earth stance because Ki regen is a major problem in Earth. To offset this I took stunning blow as well as SF so I can stun without using Ki.
These guys are *very* different and it took some major adjusting to go from the Dex/wis Drow to the Str Horc. It was equally, and in some cases more, difficult to go from the Horc to the Dwarf.
One more thing...the new Cleave feat is the shiz....great for Ki regen.