If looking for fast 'Aero' then the
Cero RC45's full carbon clinchers from wwwcycledivision.com will take some beating for value & weight at £799 & just 1545g, you would have to change your brake blocks to carbon specific ones though.
Saturae 50mm full carbon clinchers are about £720 from wiggle.
I like FFWD (Fast Forward) full carbon clinchers in both F4R FCC & F6R FCC versions (45 & 60mm depth) but would be hard to find under approx £1100.
Look for big wheel sales on at
Probikekit,
CRC, Merlin,
Ribble &
Wiggle.
Got my Easton EC 70 SL carbon clinchers from CRC in a sale last year for £550 ish, half RRP.