I decided to pull the trigger on a new 29er MTB. I have a 16 year old Cannondale MTB that served me well as a newbie MTB rider the past 2 years. I am in the northeast USA and ride all single track which include some very technical sections(rock gardens, logs jumps, etc.). I want to get a new MTB 29er full suspension that will last me the rest of my single track riding career. I am 6'2" 250. Any suggestions? I am looking at a Gary Fisher RumbleFish II or a Niner RIP 9, only because these are the demo bikes at my LBS. Any advice? The one concern I have is if the wheel set will be beefy enough. When I got my road bike, after about a year or so I started breaking spokes and ended up getting a new rear wheel built. Thanks.