I actually got to test a Lexa a few months ago on a trainer at a bike shop in Charlotte. They actually had a 47cm. It has a nice feel to it. My issue is I'm short (5ft), but have shorter legs and a longer torso. Unfortunately most companies do not make men's frames that are small enough for me to ride and the ones that do only make certain ones that way. However the Lexa was able to be adjusted to fit me by the guy at that bike shop. I'm actually looking at getting a Madone (I currently have a Trek 2000 47cm men's bike). The sister store to that one does carry Madones and Cervelos, but of course did not have one in my size (they would have let me test ride it). Also checked the two Trek stores in Raleigh and the one, well I'll never go back there, the other one also didn't have one in my size. Make sure you find a really good LBS. I currently fell I have to drive either to Mooresville/Charlotte (5 hrs away) or Raleigh (2 hrs away) as our local one is good overall, but can PO me at times as they really push Cannondale over Trek (I can't ride Cannondale as they are too big for me) and do NOT understand why I prefer certain men's items to women's items. UGH! Like the saddle I have for my road bike is a men's saddle which I LOVE, but they think I need to have a women's saddle. Um isn't fit and comfort supposed to be the important part here?
Sorry for going off on a tanget.