I currently have 2 pairs of studio 20's and 2 cc 570's for my centers and the PS 1000 sub. I was going to go to 40's but am now thinking 60's. I only use the sytem for watching movies/tv, and from what I have read they say the extra base extension is overkill that the midrange is better in the 40's. Originally I didnt want to go to floorstanding, but the cost is about the same, ether studio 40 with stands or 60 without.