I've got about 3k miles since May on my Centurion LeMans conversion and want a new bike, for fit/comfort reasons, but also performance.
It will be used primarily as a commuter/road bike. 2x daily 8mi solo sprints thru suburban traffic, with 40-100 mile weekend rides mostly in relatively fast (25+) pacelines. It will have front brake, 49x16/17, bullhorns most likely.
I love riding my current conversion and use it for all the above, but it could be a bit more comfortable (mainly ride feel) and definitely more nible (but not neccessarily track bike nimble) as the Centurion has a long wheelbase and a high center of gravity it handles like a truck (goes straight, but too slow on turns). Its a 61cm cromo/high tensile frame with a 57cm top tube and could be more responsive when applying power. My other bike is a 57cm (with 58cm top tube) Lemond Poprad cyclocross bike which is much more nimble and doesn't feel as harsh, almost cushy in comparision to the Centurion.
I'm hands on familiar with Surly Steamroller and Soma Rush frames and the Lemond prebuilt, but don't have much knowlege of what frames (beyond the Surly/Soma) may be a good fit for road use and fixed gear. I am aware of Raleigh Rush Hour, IRO, Bianchi, Gunnar. But I don't know enough to know which may work better for me.
What I am looking for are suggestions on frames, less known or popular, that may fit this desire, with the result of a built up bike being around $2k or less, with willingness to put more relatively into frame vs. components and upgrade as the older ones wear/break.