Sony receivers make wonderful doorstops. If you don't care about the sound, Sony is the perfect choice (same goes for HK, this isn't 1973 and HK hasn't been very cool since then). Then again, if you don't care about the sound, why buy a receiver at all? Just use those fine speakers attached to your video device. Even many low end projectors have a teeny little speaker in them these days. Turn up the volume and revel on the glory of your video panel. Who cares about the sound.
All of which is to say, and there are many aphorisms I could use here (but I won't), either spend something appropriate, re-evaluate your budgeting, or go plan C (using those nifty speakers in your display).
On a positive note, Yamaha, generally speaking, manages to nicely balance video features and audio quality on the low end.
In-ceiling speakers, again the question is budget. There are a lot of companies that make some nifty, if not cheap, in-ceiling stuff. Speakers are a more personal taste question than perhaps any other part of the system. The "rights" and "wrongs" are much more blurry. That said, if you buy it at Home Depot, it's probably not a good speaker despite whatever the box says. Check some decent brands and fer gossakes, buy something that has a decent warranty so you're not only having to pull the bloody things out of your walls and ceilings if they blow but are forced to pay for the new replacements instead of getting them free. At least a five year warranty, typically unconditional, is the base.
One commentor above noted the importance of video quality to audio quality. Again, somewhat subjective but let me make this analogy. Next time in you're the cinema and watching a feature film, ponder how important the mostly invisible audio portion of your time there is. It's really vastly more important than most people think. That said, TV's are sexy and no one has ever gotten laid because they had cool speakers (well, at least since the mid-seventies). The people who advocate spending $3k on a video panel and $500 on some home theater in a box are the same ones who think it's cool to slap cheap rubber on M series BMWs. Balance out your budget or admit you only care about certain aspects of your home theater and act accordingly. There's a reason it's called a "system". All the parts should work together. Some it isn't just there to make holes in the walls or add a few more margin points to retailers bottom line.
I could go on and on but I won't. Suffice to say that you either get it or you don't. If you do, do yourself a favor and buy from someone local (chances are, you already are if you get it). Buy stuff you can actually hear before you buy it and don't take crap from a salesperson. If you don't feel as though you know or have heard enough to confidently make a buying decision then that salesperson and retailer has failed. Move on. All of which goes to say very little for the sellers of gear that don't even try to do that.
And no, I don't own a store and even if I did, I wouldn't sell anything to you. Don't mistake my passion for pointless ranting.
It's funny, when it comes to music, most people will admit that the for much of the mainstream, whether it's Britney Spears or whomever the empty vessel of the hottest producer currently is, that yes, most music buyers don't have great taste. Yet, when it comes to the gear behind home reproduction of sound and video, all of a sudden we start hearing how 50,000 happy customers can't be wrong. Hell, 50,000 customers are wrong every day. There's a reason Circuit City and Best Buy are still in business.
Swim upstream a little bit. Put a little work into your effort. It will repay you quite well.