how much do you want to spend?
if your looking to replace your klien, you can do that with a modern carbon frame - if you want a more relaxed geometry as your prime bike?
in that case i would reccomend a cyfac (what i ride, so i am biased!) but truth is... for ~4-6k range you can have a custom fit, custom geometry, state of the art, full carbon, frameset that will be lighter, sprint, accelerate, and climb, descend, turn and handle better, not beat you up and look the business. honestly, my 'road' custom cycfac is a better crit bike than my old crit bike!
you can find other carbon frames cheaper - but for long rides, the #1 thing will be fit - so you might want to consider custom size and geometry (cyfac does both - not just custom fit like some other frame builders) you really can have "just about" everything in one frame, but... its not cheap, but, it is worth every penny.
check them out in the us, talke to Eric...
Cyfac Custom Bicycle Frames
components - i would agree, scram red. compact crank
i would gues at your height your not light... so some solid wheels, nothing too low on spoke count or soft rims.
if oyu wanna go cheap... gosh, i dunno anything in the 2-3k for a complete bike range.. .they are all a comodity and comparable - just ride and get what feels like it fits the best, specialized, trek, scott, fuji.. check out felts. time are really nice imo - but your getting close to cyfac pricing, and you get so much more with the cyfac for a just a little more.