OK--I've been beefing up my HT lately (adding an SVS PB10--yessss!--, a JBL EC35 center speaker, and two JBL E80s for L/R), and now it looks like I need to upgrade my surround speakers. It seems like the general consensus around here is that the surround speakers are the least important speakers in a HT setup, b/c they are used the least. Right now I am using my two front speakers from my old $200 Sony HTIB for the surrounds. They do the job--but I'm wondering if I could get far better sound with upgraded speakers? Or would it not make much of a difference? Is it critical to match the surround speakers with the same brand/model as the fronts? Which surround speakers do you guys recommend? Thanks!