In 2008, I bought the Klipsch Quintet SL set, and have enjoyed them (with the exception of weak vocals from the center channel). Newegg is having a deal for the next 3 days with significant money off the Polk Monitor Series II set. http://www.newegg.com/Polk-Audio-Hom...t/ID-12345-494 Is it worth the upgrade? I could get a pair of Monitor 50's for $75 each, the center channel CS1 for $99, and a pair of bookshelf Monitor 40's for $125. That's about $375 for a new set. I just want to make sure it wouldn't be a marginal upgrade from my existing Quintet SL's.