Alright, so I have a bit of a challenge for you guys. I hardly know anything about speakers that go in the ceiling but after much argument, this is what my parents said they want in their living room because they want nothing on the floors. They drilled the holes in the places I told them and basically, I figure the following is what I need...
Ceiling speakers are usually circular and commonly around a 6" diameter so that's what I told them it will most likely be. They now expect that so I hope I wasn't wrong. The front and back two pairs will obviously need to be able to tilt or at least be built already tilted at a predetermined angle. The side pair needs to be facing down as they will practically be right above.
In order for this to work properly, I assumed the center would also have to be a ceiling speaker but they didn't want it; I told them it will sound ridiculous if, for example, there's supposed to be a helicopter flying around you - I tried to explain. Any in-wall speaker that'd go above the TV or one that just mounts on top of it would be a better solution than what they're telling me they want to do. I think I can convince them of that.
Lastly, the subwoofer also must be in-wall. I know that's not very good and this kind of setup is way more expensive but that's why the budget is relatively high for it.
I presume the right way to go about this is up to $400 per ceiling pair, up to $500 for the subwoofer, and $100-$250 for the center. A little more for whichever of those three would be okay, if there's something that'll be found well worth it, relative to whatever is for a little less. If you're wondering about a receiver, we already have one :D It's pretty good - a Yamaha.
Suggestions for any part of this setup are really appreciated. Thanks in advance, sincerely. Some more info might be necessary that I didn't think of so please ask if it helps
EDIT: Even my grandfather understands that a subwoofer shouldn't go inside the wall by any means. There is hope yet. Maybe to make things a bit easier, an appropriate regular sub can be searched for instead. Also, we're working under the assumption that the center speaker is also in-ceiling. I know that's wrong but nothing I can do for now.