I am putting together my for ht system and have these speaker coming for fronts. I haven't seen much on here about them and was wondering what to expect. They will be used in a 5.1 system with a sub. Still trying to decide on sub. Going with Energy c-r 100 for surround. Will the Energys sound good with the Polks? One more question. How much better does the CSi A6 sound than the A4? Polk Direct doesn't have the A6 right now but does have the A4 for $150 plus $20 shipping? Is it worth waiting on the A6. Thanks for any info you can give me.