Hi everyone,
Quick update: I didn't buy the Sony receiver on Black Friday (I didn't feel like standing in the cold for hours waiting for Best Buy to open). But, as I did some more research on it, the STR-DG510 appears to only be able to support 3 external pieces of equipment at a time. Seeing that I have 4 (DVD, PS3, Wii, Cable), that wouldn't work too well. Does that sound right or am I completely off? (3 does sound like too little)
I believe that any modern AV Receiver should be able to support many more inputs than that. This depends on the interface you choose - component video, HDMI, etc. It looks like you have two each component and HDMI inputs, so that's four devices you could hook up there. I assume your cable box outputs either component or HDMI, correct?
You could try to use the component connections for two of the devices (2 input - one output to component input of the TV), then routing two other devices via HDMI in the same fashion, but would require switching the TV's input selector depending on the configuration.
OR, you could buy an inexpensive external switching device, run all your gear into that, use its output to your receiver, then into the TV. But the problem with that is that if you want to have specific sound-fields set for each device, then it could be a hassle in that regard, because every device would be coming into one input.
Either way you slice it, stick with the higher quality connections first.
-HDMI
-Component Video w/Digital coax or optical audio (the red/green/blue connectors)
-S-Video
-Composite (the single yellow RCA connector on many included cables)
-RF (which is your typical incoming cable line, or the coax cable used to connect your old VCR back in the day - carries both composite video and stereo audio channels on one wire - VERY poor quality for HD applications)
In this order...
Do some research on other receivers. My Yamaha accepts three different component video sources, so I stick with that for my needs at the moment - My cable box is the HD version, which inputs to the receiver (my TV is a SDTV with component inputs), and maxes out at 480i resolution, which my cable box does support); DVD player, and computer (VGA to Component video via scan converter device). My regular Xbox (not the 360) has standard A/V connections (L/R audio, composite video), which inputs directly into my
cable box, which upconverts it to component and goes into my system on the same set of wires my regular cable does.
There are tons of options out there. Explore what works best for you.