I have a Jamis Dakar full suspension mountain bike that I have really enjoyed for the past five years. I have made it work hard for me and it has come through very well until recently. Its most recent ailment is the back shock breaking and it does not appear as though it can be rebuilt. It will cost about $270.00 to buy a new one and install it according to two LBS I visited. So..... is it time to invest in a new mountain bike?? I understand there are lighter bikes out there and have seen the shocks that can be adjusted. I rode my son's hardtail two days last weekend and admit it handled great, but I started feeling really nauseous from all of the bumping. Does anyone have recommendations for a full suspension mountain bike and does one's body weight make a difference in how they handle?