I have just switched from prologic to dolby digital 7.1. I am currently using an onkyo sr573 receiver,polk monitor 11 as front speakers(11 very similar to 10) and a sony wa700 sub. I would like to find some surround speakers that match the monitor 11 sound. How about the m20 or r30/300? CSM center? M10? I almost forgot my 11's have the pearless tweeters.