Hi hb, when looking for a track to start out with many suggest the Tomy AFX SUPER INTERNATIONAL 4 LANE RACE SET. I had one myselt and its a good size set with lots of track. If you keep an eye out you can often find it in the $120 to $130 range.
I just got back into it myself a few months ago. Started with the 4 Lane International set. Then I just added from there, a little here, a little there. I was recommended that set by members fo this board. Im glad I followed their advice.
Dont forget to stock up on Auto World cars! The XTractions are pretty much a re-pop of the AFX magnatraction and the variety of bodies is just as good if not better than the AFX days. Grab some of the AFXtras A/P vettes while youre at it!