I'm thinking about selling my old bike and opting for a new one. When I sell that bike and combine it with some cash I saved I should have about $550. I'm wondering what kind of hardtail in that price range would suit me. I'm probably only going to do mild trail riding, about twice every month or two. I mostly ride around town and do some ramping with my friends. I also have alot of off-road area around my house that my friends and I race in. It needs to be able to take a bit of abuse also. I was thinking about getting a Kona Fire Mountain or Specialized Hardrock Disc. This will be my first serious mountain bike, and I'd like it to last till atleast my freshmen year in high school (I'm only 12). I'm also probably going to give it to my little cousin when I out-grow it.