Title says it all. After much research I am down to these 3 budget receivers. I know the SR503 is a little "below class" from the 603x/v657 but very cheap (less than $300). I am looking for people's real world thoughts, experiences, etc., esp if anyone went from a SR503 to the 603 or the yammie...people who have actually heard and compared. Yes, I have searched and I have seen the glowing review of the RXV657 by AV Guide monthly. I'll be driving Axiom 22ti speakers and will use it about 70% music (CD and SACD) and 30% movies/Direct TV. thanks