CLXs for TV speakers... seems like overkill to me, but I guess it depends on one's particular situation. Certainly if the longer term plan was to evolve things to a full surround sound system, then kicking things off with CLX as main left/right would be a glorious beginning.
On subwoofing... if Blu-Ray is in the mix and you like your wall hangings aggressively tilted, then yes a SW would help... but with speakers of that caliber, you would want a serious subwoofer to integrate properly. (ML or JL at least)