I currently have a Polk RM5400 set that I have been pretty happy with. However, I am looking to fill a slightly bigger space in the near future, and I am looking at POSSIBLEY selling my current setup to some sucka (jk ;-P) on EBay willing to pay more than they should. In exchange I am going to go buy a new setup. Current setup... Onkyo TX-DS676 Receiver Polk RM5400 (1x RM2500C Center, 2x RM2000II Front, 2x M2 Rear) I was looking at either the Polk 66xx, 67xx or Polk 72xx 76xx series systems. My 5400's will probably fetch $700-800 if I do everything right. I would be willing to shell out a little more, but am on a tight budget (so lets say sub $1000). 1) Are the above Polk packages good? 2) ANy reviews and/or thoughts on thme? 3) Any other suggestions of speakers I should listen to in the $1000 price range? 4) Should I stick with what I got? I plan on visiting several local home theater stores this week and would liek to have a game plan in mind before visiting. Thanks for the suggestions!!