Well, the bike I have is not on your list but I would recommend it to anyone. I'm 6'6" and 260 and ride a cannondale Jekyll. I looked at everything and the Cannondale is extremely durable. I ride it three times per week without a problem. Unfortunately, the Jekyll is a full suspension bike and a bit out of your price range. You may look for a used hardtail though.
I upgraded to some Shimano W535 wheels after tacoing my front wheel in a crash a year ago. They are a deep dish wheel with 13 guage spokes and extremely durable (and good looking too). I just had my bike in for a tune up this week and the mechanic found them to be true! This is the second inspection I've had in over a year. I highly recommend them. Follow this link for more information:
http://bike.shimano.com/wheels/mountain/index.asp
Another word of advice, look for good components and a frame warranty. Big guys break things. Also make sure you have a reputable company behind your frame in the event you crack it. Cannondale offers a lifetime warranty on their frames.
Best of luck with your search.
Chris