I ride a Spicer (
http://velospace.org/node/123) and I really like it. Its a good aluminum frame, stiff as hell. The dropouts have replaceable titanium bits so I don't have to worry about chewing up aluminum back there. I've ridden the frame on all sorts of surfaces and enjoyed all of it (on the street, on the velo, on the prarie path, etc). Gene is a fantastic guy to boot