The salesman at Best Buy sold me a TV that won't work directly with the receiver I currently have, so I'm asking if there are any gotchas with the receivers I've picked below and my setup, or if there is something else to consider for the next 5 years or so.
Back story: I was given a Sony Bravia Surround sound system ( DAV140). I had wanted surround sound so I could better hear the TV without cranking it, so it was appreciated. However, my pre-HD TV didn't work very well with it. So I bought an LG LCD model 42CS570. What the salesman didn't tell me was that it only outputs via optical cable - and the Surround system doesn't do optical (and then I realized it must be an older one because it wasn't blue ray, either). It seems I should get a receiver to fix this and prevent future compatibility problems, rather than find yet another workaound.
Obviously, I'm not a power AV user; I just want to hook all this stuff up and have it work without six remotes and a CAD drawing. Besides the TV, I have a Roku 2XD, U-verse wireless and TV, and the Blue Ray player (fairly new and with HDMI port). I will use the Sony speakers for now, since I don't have a need for throbbing bass or loud sound levels. Mainly I watch TV and movies on this, no video games or game systems.
I think this receiver will work: Onkyo TX-NR515 or TX-NR616 (the 515 apparently has some reliability bug), but the whole 5.1 vs. 7.x has thrown me - will it still play just fine with 5 channels? There's also the Yamaha RX-V473 5.1-Channel that seems well rated and has the ports I think I need.
Any advice on a workable setup that I can use for the next 5+ years would be greatly appreciated. Alternately, if you can tell me where to find local AV experts/stores, that would be great. So far, what I've found is for cars, or they work regular business hours like me and their business seems more like a private office than sales. I hate to even call this a home theater, but it seems those businesses are the next step from Best Buy...