You can do either. I had a pair of the perfects a while back. I was giving each about 500w from a RF BD1000.1. I also was using a RF 800.4 to run my components up front.
For the perfects I would reccomend a class d amp. They are very efficient as compared to normal a/b amps. But they are only meant for subs. Plus you can get them pretty cheap. I would also reccomend getting a amp for your highs to help balance the output.