Will also need some McIntosh mono blocks to power them.
I heard a pair of these hooked up to a Mcintosh amp in a local audio store. These sound very nice, I do mean very nice. The low end is supposed to go to 20hz with a proper amp. Depending on what you are going to use them for after you actually buy a pair, you will not have to use a dedicated sub woofer. These things will not disappoint. Good luck. I have the B&W CM10's with the matching center channel and two older B&W surround hanging on the wall. I love the sound of B&W.