If you haven't already tried a Tarmac SL2, I think you should. You can get it with regular geometry or in team geometry (which has a shorter head tube). It's what I'll be buying as soon as I save a few more pennies. Of course, if my budget were $5k, I'd have a really hard look at the Wilier Cento1...but I'd probably still get the Tarmac and a set of HED Stinger 6s for that $5k.