Here's my non-expert advise in choosing a receiver.
Choose the model with more power as much as possible. If you have money to buy a brand new 607, why not look for an alternative like buying a pre-owned 805 at the same price. As per experience with receivers of different brands & models, lower-end models equipped w/ new technologies
DOES NOT EQUATE the power of higher-end older models. In other words, the more power, the better! Lets put it this way, I have this Denon 789/1909 that can internally decode lossless codecs, the quality of sound it produces cannot beat the Marantz SR6001, Denon 3806, Yamaha 1700, HK 347, Onkyo 804 & the non-HDMI HK 635. Though negligible difference vs. the Denon 887. It is good to see the receiver displaying " Dolby TruHD, DTS MA" whenever you play lossless codecs but thats just it. Of course it's totally different story if you have the extra money to buy high-end new models like the Denon 3310, Onkyo 876. Please note that I am not giving this advise because i have receivers for sale at the marketplace. You can look around, visit reputable distributors here in the Philippines and ask (better if you compare side-by side) for older but higher end models. Iwasan na ang SARS ngayong 2010, Iba na ang usong sakit ngayon!