Yeah, I'm a longtime Onkyo owner.
Just as an example off the top of my head, when digital HDTV started to be the norm you could only get the lip sync delay adjustment in the 80x series. Now the 605 has it. Even the 5 series now has HDMI switching (although it is pass-thru and not repeater functionality like the 6xx and above).
It's just the way electronics work. If you can wait 3 years, the then current 5xx series will make today's top of the line model look like a piece of junk.
