Hi! I'm a fairly new biker...I use to ride a lot in my twenties and I'm getting back into the fun and fitness of it! I'm purchasing a Cannondale RZ mountain bike. I'm trying to decide if I should get the RZ 140 5 all mountain(140mm travel) or the RZ 120 4 marathon(120mm travel)? Both bikes have the same price. I read that you can do marathons and cross country with the RZ 140's even if its a bit heavier (but sturdier)among other things. I like a little of both: long rides and going down hills jumping certain terrains. I would also like to ride on the road to go the gym or to enjoy the beautiful day. Personally, I've checked the specs for both bikes and they are both pretty close in detail except for a few parts; I heard there's not that much difference other than the suspension travel. I'm a fairly big dude (5'9 220 + lbs) and I'm incorporating bike riding into my fitness to get into shape. A sound (beginner to proffesional) advice would be appreciated! Thank you!