DJ 2wItchY, Jarr3tt88, Dosto, Heetsauce, Skumbag, lespritdelescal, and many others make good tracks.

I even make a few, they aren't typically as good as some other people's tracks, but they aren't bad.

Send a FR and give mine a try, they are usually easy to complete, yet hard to master.

PS: Stay away from my Gladiator and Diabolical tracks, I made then specifically for the Ninja crowd.

PPS: Check out the 94 tracks entered into the UCCC2 (all have HD videos on http://www.YouTube.com/trialshdfan) as All of them are solid tracks that everyone should have in their collection. There are a few Extremes, but they are still worth the play because of how well they are made.