I am entertaining the following speaker systems to go with my Onkyo 501 receiver: Polk RT28i X 4 with a Polk CSi30 center vs. NHT SuperOne X4 with a SuperCenter from OneCall. Due to lack of scratch, I plan to put off the purchase of a SW. While I understand that this question has limited value, unfortunately it is very difficult for me to audition speakers since I live in Dogpatch, USA. I did here the SuperOnes' about two years ago and they were pretty cool. While were at, must I get identical front and surrounds to properly listen to new recording formats ie, SACD and DVD-audio. I suspect 80% music listening vs movies.