Just bought a new Norco Mountaineer. http://www.norco.com/bikes/2003bikes/mountaineer.htm I was wondering if this bike would be worth upgrading. THe frame seems to be very solid. It has an over sized type aluminum frame. I was wanted to get a better fork, maybe one with 100mm travel, & better tires. And if the gears start to get worn out maybe i'll upgrade those too. Any suggestions?