Ty, here's what's gonna happen. You'll get the AVR, set it up, then come here with a bunch of questions about, "Which setting is better?".
You'll get a lot of answers. Some are clear cut, some are simply a matter of preference. You'll persist, trying to understand "Which is better?". As you learn more and get more comfortable that playing with different settings is not gonna fry your AVR, you'll slowly come to the realization that the real answer is, "Whatever sounds best to you". And it'll finally click that people told you that 100 times not as a cop-out but because it's the truth.
You're gonna have a ball!!! Enjoy the ride!