rear surround speaker 7.1

[thuchien]

I am planning to by 4 speakers for my rear surround to do 7.1. What kind of speaker should to buy for my rear and back surround? Dipole or not?
thanks

[bdaley6509]

Dipole for the rears, bipole for the back. How do you like your compositions? I used to own a pair, and somewhat regret selling them. Nice speakers.

[thuchien]

I realy love the infinityP-FR, I got them from craigslist for $500. Should I use four P-QPS or 1 pair of P-QPS and something else?

I don't know where can i find the center to match.