Well, aside from recievers, I can give some advice on what burned me.
1. Don't go for the recievers that have speakers included. Suck-it prefab stuff
2. Think about what you want to do with it down the road. Mine is basically a waste now because I did not research what was coming out, and what I would use it for. It does 5.1 audio fine (YAMAHA) and too few digital inputs. On top of that, I was right on the brink when I bought it of recievers beginning to add S-VIDEO switching as well as composite. Thirdly, mine has an external decoder option which is a waste of space and technology to me. The external decoder must loop back to the reciever, so I'm always limited to 5.1. Not like I can get a 6.1 or 7.2. I'm stuck with 5.1. Now, most recievers are beginning to add Component Video switching (sometimes two inputs) along with S-Video Switching which is nice, but I really don't care about it until I get an HDTV when they don't require rights to the firstborn.
3. Get something that has onscreen (TV) menus for the reciever. That's a nice thing to have.
4. I'm not an audiophile to the max. I've listened to a 5.1, 6.1, and 7.2 and the 7.2 sounded great, but I just douldn't tell a lick of differnce in the 6.1 (rear channel center). But, the only reason that I like Worst Buy is that great 30 day return policy with no haggling. They accept it if you buy a reciever (test it out, don't like it and bring it back for the next model). Too bad they have a lot of crappy brands, but it can at least let you get a feel for what features you want. IF their stuff sux, then return it for the full refund