I'd second the suggestion of McCormack amps for Proacs. I've used a DNA 0.5 Deluxe with both the Response 2s and Studio 150 and both combinations sounded spectacular.
Amplifiers for ProAcs
I am looking for a surround sound processor/power amp. for Proac speakers - Response 1.5 main speakers, CC1 center and Tablette rears. Dealer recommended Harmon Kardon Signature Series. I have also seen used Lexicon DC-1 with ATI combinations on the net for sale. Any suggestions would be greatly appriciated. System is used probably more for home theatre. Both packages come to around $3,300