I just got into mountain biking this year, and haven't gotten to ride much at all. But I would like to experience a broad spectrum of biking. From smooth long trails to sharp technical trails with jumps and everything. I bought a 2013 Trek Marlin from a local bike shop because that's what they said would be perfect for me. They are more of a road bike dealer but still had a decent selection of Trek mtn bikes. My Marlin has shimano thumb shifters, quick release wheels, disc brakes front and back, lockable front suspension, A frame, and 29 inch wheels. All for approx. $690. So, did I make a good choice? Or have I been duped into buying something overpriced or not what I specifically needed? Any pointers or advice would help. Thanks!