If you are a DIY guy, have you considered building your speakers?
I have just built
this in wall system. You can come out in budget. It has an in wall sub of unique design also. It uses a 10" driver, but fills a large space easily and has good measured response to 20 Hz. That is because it is a unique transmission line sub.
I have all measurements. I'm certain that there is absolutely nothing comparable to this on the commercial market. It is not just good for in wall, but a really good speaker system.
The tweeter for the center is NLA, but I have found a SEAS unit, that I can easily make a mod to the crossover for.
This is a powerful speaker system and will fill your space and more without breaking a sweat. My wife in particular has really enjoyed the system. I have caught her really driving it hard!
The design is preserved in the computer of the C & C machine at A & K cabinets at Albany MN. The owner has told me he can make the boards available as a flat pack or the completed cabinets to anyone who wants to build this.
There are limitations to an in wall design, as there are reflections from the wall. However this system sounds very good. In particular speech is very clear and natural.
I think you would build this in budget, at least the front three. You can add more of the two ways as you want for surrounds and rear backs. You can add another sub if you want, but I doubt that would be necessary,.