Amp for B&W Matrix 803 S2

Thanx for so detailed reply! The room is a very small - about 3,5x5 meters. Please find the attached picture - red dots are the ACs, and green dot is me)
https://lh3.googleusercontent.com/-zu11EN6OSaM/VUusP3EX6AI/AAAAAAAAHSw/4WIZyCR4k4c/w503-h360-no/IMG_20140507_200054149.jpg

Talking about the kind of music - classic and modern rock, hard rock and metal, maybe jazz...

Regarding BAF filters. It's very contradictory information in the Internet. Someone says that they aren't necessary for 803 S2. Anyway I guess it's not easy to find them nowadays especially here in Russia...

Get something with 300 w/ch or greater and decent quality - does not have to be new. These speakers need power.

I ran my 802 s3 with a 40 watt/ch Pass Aleph. It had no problem at all driving the 802's.

I was also thinking about a pair of Classe CA-M300 - but they are out of my budget and too heavy(

One more available variant - Accuphase A-46. Not cheap also but at least here I can save on shipping and customs.