Which Speaker System ?

IMHO, higher sensitivity speakers are generally better for home theater. Also, should you buy the used Wilson's, how easy will it be to find the matching Wilson center and surrounds?

Well I haven't heard that particular Klipsch but, and please don't take offense, if you're only after saving bucks, you shouldn't be looking at Wilson, especially for home theater. The Watch center channel, along with matching stand, that matches the Sophia 2 retailed for over $8,000.00 and the rear speakers are $5,000.00. And that's only a 5.1 system. To go 7.1 or 11.1, you do the math. You can find them used but a Watch 2 with stand is gonna set your back the same price as the Klipsch, and that's just the center channel! The matching rears very rarely come on here used, so they are hard to find. Also, Klipsch and Wilson are two very different brands and have very different house sounds. I recommend you audition both and see what you like better. If it is the Wilson, be prepared to make a big investment, even used. Good luck to you!
Mike