No problem - glad to help.
Since you are brand new to the world of home theater, I'll share with you some of the tips I usually give to friends and family as they start out:
1)
Think "Receiver-centric", NOT "TV-centric": When first building a home theater, it's natural to think of the TV as the "center" of the system (after all, until now, that's about all you really had) - however this should not be the case, and often leads to confusion when hooking up components. I like to think of the A/V Receiver as the "Brains" of the system. Route all of your source devices (anything that creates an audio or video signal) INTO the receiver, then from there the Reciever sends the audio signal out to the speakers and the video signal out to the display device. In a setup like this, it's possible (and beneficial) to have only a single video cable going to the TV. All the switching is done in the reciever with the press of a single button.
2)
Digital Cables are Black and White: Don't buy into the hype over expensive cables and interconnects for your home theater system - especially when it comes to cables that carry a purely digital signal (like HDMI). With a digital signal it's either 100% there or not at all. Monster cables, while nice to look at, don't add ANYTHING to enhance the digital signal. There's no such thing as "fast" or "faster" HDMI cables. Do yourself a favor and don't buy any cables from your local retailer. Reliable sources for high quality, affordable cables include
Monoprice.com and
bluejeanscable.com. For speakers, 14 gauge wire is fine, and you can find it cheaply online, too.
3)
Speakers: Where to begin with speakers...
While the Receiver is considered the "Brains" of the home theater, the "soul", IMO, really comes from the speakers. Some people recommend allocating as much as half (or even more) your total budget on speakers alone. I can't say what ratio is right for you, but good, solid speakers are the one part of the system that can easily last decades or more. Of course, when you're starting out, unless you have a ridiculous budget, you have to pick your battles, and top-shelf speakers are rarely tops on anyone's list. Hence, starting with a HTiB that at least provides a solid, relatively future-proof receiver is a good thing. Speakers can be upgraded down the road.
My advice: live with the speakers that come with the HTiB for now, and when you have the time and budget to dedicate to upgrading your speakers, tackle that project separately. There are TONS of speaker options for all kinds of budgets, but in the end, it's what sounds best TO YOU that matters. Oh, and check back in here when the time comes, there's lots to consider when buying speakers...
4)
Calibration, Calibration: With a little time and dedication on your part, even the most modest of systems can be set up to look and sound like a champ. Many receivers (the Onkyo's included) come with an auto-setup utility that uses a microphone to properly set the speaker levels for your particular room. Use it. They work remarkably well. If you really want to tweak, you can pick up a digital SPL meter from Radio Shack for about $30 and calibrate the speaker levels manually. On the video side of things, get yourself a copy of Digital Video Essentials or Avia to help you properly configure your set. Leaving a TV set to out-of-the-box brightness and contrast levels will limit the amount of detail you'll get from Blu-Ray and High-Definition video.
The folks around this forum are an awesome bunch - passionate about home theater and happy to help out. Best of luck to you - be sure to let us know how things work out!