I have the Sony STRDA5300ES...
http://www.sony.com.au/homecinema/ca...tegoryId=23688
LOVE IT!!!
...but...having said that, you get what you pay for...
It really depends how much you are prepared to spend for the features you need... If a $500 receiver does what you need, why spend the extra?
I can highly recommend the Sony for build quality and connectivity though and the upscaling is brilliant!!