If you like the late 80's stuff I think there are a lot of great choices. Late 80s upper-level Schwinns (like the Tempo) are awfully nice, IMO, and run in the 22 lbs. range. Ditto with Panasonic DX-4000 or DX-5000, Miyata 512, 912. I think the advantage of going late '80s as well is you might find the components feel modern enough that you could go with stock. Just my 2 cents, I'm sure there are forum members who can be a lot more help than I can.