Quite honestly...I would just go to a local high-end dealer and have them take you through the paces. It's so easy to listen to all these online people you've never met and don't trust with thousands of your [parents'] dollars. You'll probably end up paying more through retail than you would otherwise, but you'll more than likely get a better finished product, unless you have a good head for what's ahead of you and are handy around the house (if you're doing all DIY). Wiring stuff together is simple, but getting a real home theater is not.
This coming from someone who would rather do most of everything himself, despite being one of those aforementioned high-end retailers. I've just gotten used to all the weird knowledge that AT supplies...I've tried helping people here and there, only to have some smartass google everything I say and report back a website as being the be-all-end-all truth. Do your research, yes, don't let the salesman push you around...but at the same time, don't let the online community supply all of your information either. If you are going to rely mostly on the web, do most of that relying at the dedicated sites like HTF, AVS, HTS and whatnot. Otherwise, that's just too dangerous.
I'm sure you must have a friend or family friend that knows about this stuff...at least one person in the group dabbles in HT/home audio these days.
And I'm sure I'll regret having said this too.