Seems you're writing the Yamahas off? Just based on size, weight and construction they are way ahead of any others on your list. Just look at the fit and finish. True 3 way design.
I haven't heard them or the Kefs but I would bet the Yamahas are the better buy. If I had the room I would certainly consider the Yamahas.
Klipsch RF-62II, RC-500, RS-400, SVS PC12+,
Def Tech SC8000
Harman Kardon AVR 1600
PS3, Apple TV, Sharp 70" Qattron