Within the next week I need to go get a bike to help me get to and around campus quicker. I'm in college so I'm on a budget (about $300) and I want to get a good quality hardtail. I plan on using it to get to my classes, and want to try some trials or urban assault style riding. Just basically gettin up on and/or jumping tables and benches around campus, and maybe later some grinds and wall rides. I don't really think I'll be doing any huge jumps or drops or anything like that if it makes a difference. I've been researching a little bit but I need some input on what would be a good bike for what I want to do with it. I was looking at the Giant Rincon, and the Diamond Back response. Are these decent bikes, and would they work/hold up for what I wanna do with them??? Also I plan on saving and modding it as I go along, would I be able to add disc brakes, new bars, etc... to both of these??? If you guys know of anything thats in my price range that would be better than these help me out, I'm kinda clueless right now Thanks.

lata Wes