I can't answer pretty much any of your questions except one.
When it comes to B&W vs Klipsch the answer will be... it depends.
Anyone that gives you the definitive answer is either lying or trying to sell you on their favorite brand.
Why do I say this?
Because as with all things sound, it comes down to your personal listening preference and hearing.
That being said, you should definitely figure out your price points (per speaker) then head over to a local hi-fi shop (or BB's Magnolia center) and compare side by side any model you are debating the purchase of. Don't limit yourself to just Klipsch and B&W as there are a ton of manufacturers out there that offer all sorts of speakers to meet all sorts of needs.
I do, however, say that I personally own B&W speakers. I compared Klipsch/Energy along with Def Tech, Polk, Martin Logan and a few others that I don't recall now and for me, the B&Ws really drove the point home. But just because I love my B&Ws doesn't mean you will hear the same thing I do.