First, my system and room specifications: Denon AVR-3802, Denon DVM-1800, JBL ND310 mains, JBL S-CenterII center, JBL PB10 powered sub. Room is approx 20' wide and 30' long, listening area is dead center in room. I listen to 60/40 music/movies, but take movie sound seriously. Now my question, if you couldn't already geuss what it is: I am planning on getting four more speakers soon, two surrounds and two rear surrounds, but don't know if I should match my other JBL's by getting four N or S series bookshelf's which only come direct, or mis-match but gain bipole/dipole by getting maybe Polk f/x300i's or maybe PSB Image 10s'. Any comments? My instinct tells me to get a set of higher end (s28II) JBL bookies(smaller N series JBL's can't keep up with my ND310's in a room this size) so that all my speakers are sound matched, and since I listen to more music than movies. At the same time I am very enticed by the diffuse soundfield of a good bipole speaker. Maybe a set of Polks for the mid channel surrounds and a set of s28II's for the rear surround channel? ARRGGGHHH!! Please help me before I spend again! Thanks to all who answer.