I've moved this from the basics board as I started to have more questions in regards to my speakers. My set-up: Receiver- Sony DE685 Towers- (2) Polk Audio R30 Surround- (2) Polk Audio RT15i Center- (1) Polk Audio CSi20 Sub- DLS 10" / 100 watt (Partsexpress) Ok guys...here goes. Forgive me for being cheap and trying to "cut corners". Would there be any advantages (besides saving $$) or disadvantages in returning the R30s and replacing them with the R20 bookshelves and having those as my main L/Rs and putting them on 28" stands? The specs are almost identical. Same two drivers (Mid 6.5" dynamic balance, tweeter 3/4" dynamic balance dome tweeter). Frequency response is different and the R20s are 150 watts as opposed to the R30s at 100 watts. Difference in cost including the stands would be around $140 = a new DVD player. Also would it be a good idea to replace my RT15is with the RT15s (not sure how much of a difference between the two)? Does anyone have any experience with the R20s as front L/Rs? Thanks!