Hey guys....I'm in the process of upgrading my outdated system. 6 months ago I purchased a 46" Sammy DLP and have been running it along with an old kenwood receiver and my Infinity SM255's. I would like to keep the 255's as a part of my system because they are great for highs and the 15's kick. Is it feasible to replace the receiver and just buy rears??? Would the system sound out of balance? Toss the 255's? Any help is greatly appreciated.