Thanks Cal & all for replying. Before this week it had apparently been a decade since I looked at a receiver and began to realize last night that I might need (?) a new unit-several of the on-line guides pointed me to Yamaha. To be direct I didn't even realize there was such a feature as auto set-up.
The RX-V2500 seems to be a good unit in the $500 range, I noticed the RX-V2600 seems similar but with many other features (I'm beginning to realize now why I left stereo sales, I don't honestly know what the implications of many of the specs/features would be) but is more expensive.
Clearly I'm way behind the knowledge curve-would one of the above receivers provide most of what one needs for "good" (I think my vantage point as not being too selective has come out)?
If one buys a 7:1 unit, would there be a noticeable loss of audio if I run only mains (RF-3), center (RC-3), subwoofer (now I'm not sure what to look at) and rears (ditto)?
Again, thanks very much guys for your advice, I really appreciate any perspective.