What width tires do you have on your "good wheels"?

That may be the determining factor on what bikes you can get.

Since you already have good wheels, it might be more cost effective to buy a frame, a groupset from a UK dealer, and pay your LBS to put the bike together. You can also get your favorite seat for the bike, without having to worry about the one it comes with.

I've heard of some people getting ~$500 CF frames from respectable places in China (e.g. Workswell, etc.).

GH