I'm looking to replace my front speakers to better accomadate the new speakers I purchased. What front speakers will go good with what I have? My room is 19.5 X 13.5 X 7.5". I power things with an Onkyo TX-SR702 100W X 7. CENTER: Polk CS2, SURROUND: 4 Monitor 30s, SUB: JBL PB10. I'm thinking Polk Monitor 50s or 60s, do either have an advantage over the other or would one simply work better? I mainly use my HT for watching TV and DVDs on a 55" HDTV. Just looking for some advice and opinions from more experienced listeners. Thanks for any advice / comments.