09 trek fuel 7 or '10 specialized stumpjumper fsr elite
for big guy .. 275 5'11''
Might depend on what type of riding you intend to do and what style of bike you like.
I've got an '08 Stumpjumper FSR Pro. It's a great bike and The Brain-controlled shock is awesome: the bike climbs like a hard-tail but descends like a cushy full-suspension bike and you never have to fiddle with the shock. I haven't ridden a Stumpjumper Elite, but based on some of the other Specialized bikes I've ridden I suspect that you will need to use the Pro-Pedal/Lock-out feature on the Specialized Triad shock. From what I can tell, the FSR suspension design just isn't as immune to pedal-induced bob as some of the other designs (e.g. DW-Link). Unfortunately, I'm not a fan of many of the components on the 2010 Stumpjumper Elite: Shimano shifters, Avid hydraulic brakes, and Specialized's The Captain tires are all components I wouldn't normally choose.
Unfortunately, I haven't had a chance to ride any of Trek's mountain bikes. My general feeling is that Trek bikes tend to be a bit over-priced for what you get...