Starting small home theater, need advice

First of all, let me apologize for my lack of knowledge. I have been reading on this site, and realize how much I don't know! So, from a newbie, my apologies.

Now for the question. I've been contemplating installing a VERY mild home theater in my small(ish) family room. (prob 15 x 20). The TV is about 10 ft from the couch, and the speakers would go alongside the TV. I'm looking at a 3.1 channel setup for now, run by a multichannel receiver, with the capability of expanding to 5.1 later. I'd like to spend around $1,000 on the setup as a whole. The primary use for the system would be TV sound (80%), movie (5%) and music (15%). In my opinion, the money is best spent on quality used equipment, rather than on a "system in a box".

My biggest question is: What brands of receiver/speakers/subwoofers should I be looking for, that combine good quality with affordability? I've been looking at the Denon/B&W range, but this may be out of my price range. I assume Denon/Harmon Kardon/Paradigm/Definitive Audio are all good. But honestly, I have little/no experience with these brands. Am I relegated to the big box stores with this price range?

I realize this is like asking a Ferrari mechanic on advice to do an oil change, but I come to you knowing the collective knowledge you all possess. Thanks in advance for all your advice.

Brian