Joined: Dec 2004
Posts: 12,560
Likes: 799
From: Middle of da Mitten
Bikes: Trek 7500, RANS V-Rex, Optima Baron, Velokraft NoCom, M-5 Carbon Highracer, Bacchetta Quattro, Catrike Speed
I'll echo what the others said. Upgrade the tires, maybe see about fixing the atrocious chain line, and add accessories that will be movable to your next bike. But you're not going to make a pig into a racehorse* by replacing components.
*You can train a pig to be a racehorse, but it'll never be a racehorse. All you'll get is a fast pig.