I'm looking for an aluminum frame to build up. It will NOT be used for track racing, as I don't have a velodrome within several hundred miles. I will be using it for 20+ mile rides and maybe a few races. I'm looking for a stiff and light frame.

Background: I've already got a steel fixed (steamroller). I had a Klein Quantum back in the day which was STIFF. So I'm used to aluminum frames. I just want something lighter and stiffer than my current steel frame. I've got big hills around me, as I live at the foothills of the Rocky Mountains. Mashed up some 10-12% grades this past weekend and wished for something more stiff.

I've searched a bit and can't really seem to find something that is street friendly. Masi Cortello stuck out, but they're no longer made. I believe Bianchi Super Pista, Cinelli Vig are too track-geo oriented?

I'd like to spend up to ~$800 for the frame (or cheaper). Thanks for any input.