I'm seriously considering a 2008 Cannondale Rush 6z. Any thoughts on this bike? I'm 5'11and weigh about 165 lbs. I will probably ride about 2 maybe a week on single track with no insane downhills or jumps. Would this bike be good? I've found a very good deal on a used one. Just looking for an entry level bike to do a little mountain bike riding on. Any thoughts?