Shabycakes

I have a pair of SB-2 bookshelfs in which I'm curious as to whether they match up with the Quintet series. I'm curious about buying Quintets as surrounds, but wanted to know if they were compatible with the SB-2's? I have yet to buy a center speaker and subwoofer -- I'm building my home theater system one item at a time. I looked at the specs and found that the Quintets are not listed under the SB-2's. Could I get some suggestions?