I listened to the Paradigm Monitor 7's this morning and I was very impressed with there sound wich was running off a Marantz receiver and no amp. The full sound with the distictions with the highs and lows were very impressive. and gave some very good mid bass. I have Polk Audio RTi6's and CSi5 for front and was thinking about going with Paradigm Monitor 7's & CC370. I just got my polks within the last5 months, so do you think it would be worth the money to up grade?