How much Power do speakers really use ???????

Ok, I've got a question. I've got a pair of B&W 803's in a 12x20ft room. Moderately furnished. I play classical, jazz and hard rock almost about evenly. I like my music at concert levels some of the time and others loud enough so I have to say "what" when someone interrupts me. I rarely listen to music below that, but on occasion.

I am interested in buy a CJ MW60 or Premier 11a. Enough power? How about a Rogue 120 Magnum?

So it sounds like the Rogue 120's or perhaps a CJ Premier 12 or 8 is what I need then. Thanks.

So it sounds like tubes are not the best for these speakers then? Sounds like a tube preamp and something like the Bryston 14BST is the better choice? I was thinking about getting the Theta Dreadnaught II as well, but that is only 250w. I don't plan on getting rid of these speakers. In fact, I think I'd buy the 802's to replace them.

My speakers are about 7 feet apart and I'm about 8 to 9 feet back.

Thanks Sean. I'll see if I can audition some stuff in my area.