Hi, I saw a DENON AVR 4800 on sale today for $900 CAD and I was wondering if it would be wise to buy this as opposed to get something in the $1000 CAD eg. Denon 2805 that has PL II, Pioneer Elite entry level... I was told that sound wise I will have a bigger improvement with going with this "higher model" denon even though it's a year 2000 product. BTW I have B&W 601 series as my front/center speakers. I wonder if I would experience a big sound difference with a new receiver. Any expert advice?