My 608 is still running great as well. On a couple of occasions I have explored replacing it. But I always start the process by making a list of "must have" features and a reasonable budget. Then I come to the conclusion that I already have a receiver that I am happy with,
and it has all the features i require. (Although I must admit that networking capability would be nice.)
Panasonic TC-P55ST50 Plasma 55"
Oppo BDP-83 Blu Ray, Toshiba A30 HD DVD
Onkyo RZ-900 Receiver (7.1 Config)
Klipsch R28F, RC500, RS400, RB600, SW10 Sub
Cisco Explorer 8642HDC HD DVR
Mac Mini/PS3/Wii, Harmony Smart Control