I ride and race 2009 Jamis Xenith SL and this bike works for me really well. It's a BB30 tapered head tube frame weighting around 970 grams (without fork). My SRAM RED setup with DV46C-ULis approx 14.6 lbs. The bike handles really well, is solid, stiff, and reliable - great on tarmac as well as in the Kermesse type races. 54cm fits me really well. But then it's all based on no experience with other higher end bikes.
I will most likely be getting another bike some time this year. The question is: should I continue with Xenith SL frame (would most likely try to get an almost new 2012 model priced between $1K and $1.5K) or will I be better off with something else? My team gets great discounts from Specialized - a new S-Works SL4 frame would run only 2X as the above mentioned Xenith SL. And then there are other brands I like as Kuota, LOOK, ... But I have not ridden/raced on any of them.
I am a decent (now Cat3) racer in most styles but tend to prefer hilly road courses; weight is a factor. UCI specs are not my concern at this moment :-). Where I race we tend to have many sprint finishes too.
The bike will definitely be getting SRAM Red and 3T cockpit.
If anyone has some opinions on Jamis Xenith SL versus .... I'd love to hear them.