I have Def Tech 2002s (bipolar, powered sub), C/L/R 2002 and the BPX surrounds hooked up to a 990/755 (predecessor to the 7500) combo. The switch to Outlaw from my previous integrated amp (Yammie 75 wpc) really opened up the speakers. You might get the same results with a high power receiver, but then you probably are getting pretty close to the cost of an Outlaw pre-pro combo.

As to how to set up the speakers, I suggest sending an e-mail to customer support at DefTech. Chet Pelkowski (info@definitivetech.com) is very helpful and will advise on various options for setting up your speakers. Good luck!