I don't know much about Paradigm, but aren't they on like v7 or v8 now? Not sure if they go in order or if they come out with a new model every year or so...but those v3's might be quite old and hard to find a matching center. I'd try the Paradigm thread. They'll tell you if they're a good buy.
I was going to mention the EMP e55ti's and not purchase a center for now, but seems like they're too big. If you want a "no center for now" setup you could also check out the Ascend CMT-340se
...get some towers like the e55ti's, HTD level 3's, etc and just shrug your shoulders when they come in. Maybe followed by a "oops, must have ordered the wrong thing"
Panny 65st60 / Denon X1000 / EMP e55ti / EMP e56ci / EMP e5bi / (2) e1010i