I would prefer the Paradigm's. I have heard both brands for a long time and for the money nobody produces better bargains than Paradigm. The Studio series is superb and will match perfectly with your Rotel. I like B&W very much as well but if it was my money I'd spend it on Paradigm.
So with Paradigm you would get a sub, but with B&W you wont? If this is the case I would have to agree with elitefan, although I've never even heard the Paradigms.
Because the B&W 700 series is very expensive, my budget only allow me to buy those 3. In your opinions, is the Paradigm sound better? I listen to both, they both are good, they look very very nice too.