First off, I have to admit that I'm incredibly new to this whole "home theater" thing. What I know about stereo systems, speakers, receivers, etc, is laughable. That said, I've been researching heavily this past week with the intent to buy myself a decent home theater system, one intended to be used almost exclusively will movies. Granted, there will be some marginal music usage, but 90% of the time it'll get used to watch DVDs.
I've settled on the BIC line of speakers - the DV84 towers, DV62 bookshelves, DV62CLR center, and eventually the 1220 subwoofer. I'm having some difficulty deciding on a receiver, though.
I've pretty much figured out that I want the Yamaha RX-V550 or the Yamaha HTR-5850. As far as I can tell, these are the exact same systems, albeit with different faceplates. I have to admit I like the RX-V550 face more, but... I'm unable to find it locally for anything less than $450. I can find the HTR-5850 online through an authorized Yamaha reseller (B&H PHoto).
The Yamaha website claims that the RX-V series is ONLY purchasable through authorized brick and mortar stores; if you buy them anywhere else, the warranty is null and void. Is there any truth to this? I don't want to spend more than ~$300 for the receiver, and I want to get the warranty... so... do I have to go with the HTRs?
Any suggestions, comments, or advice you may have would be much appreciated. I'd like to order this as soon as possible, so...

Please keep in mind that because I'm new to this I'd be happy to also hear any comments on my choices for speakers and receivers.
I appreciate your help, and I apologize for sounding like a total newbie (deservedly so).