Well, the home theater bug has bit me hard and its time to start upgrading the aging home theater setup. I currently have a Onkyo ht-r550 (receiver from ht-sr800 htib) and was wondering if upgrading to a Pioneer vsx-821-k is a worthy upgrade or just a side-grade? Current speaker setup is JBL Northridge N38 mains, N-center center, Dayton Audio B652 rears ( have JBL N28 but the tweeters met with my little girls fingers) and a soon to be replaced Sony sawm40 sub. Thanks in advance!!!