Hey, looking to upgrade my switchback to a better bike. I'm looking to do freeriding and xc. I currently have a mongoose switchback that needs work and figured I'd either upgrade the parts or prob be cheaper to upgrade the whole thing. I was looking at the trek 4300 disc, 3900 disc, 3500, gary fisher wahoo. I know I got a list but I don't totally know too much about them either these are the ones that caught my eye, I will be getting info tomarrow on them, I was looking to get some more info on other brands that would be good for what I want. My budget is hopefully no more than 700.