Don't know about the w3's but I run the m60's and the 350 in a 14 by 22 room with m3's as surrounds.I had them on stands oposit the 60's and it worked great.I eventually went with the fmb's and wall mounted them about 8ft high just to clear space and I really enjoy them now.Sometimes I shut everything down but the m3's and just go with them.Keep in mind I am mostly into music though,hope that helped.
Al

M60-VP150-M3-EP350
Boston AVR7120