GreenGiant117

Hi All,
 
Until recently I have been using an old (ca 2008) Philips Home Theater in a Box solution, taking it with me from my parents house, to my first apartment, to my first house and now in my second. Unfortunately it recently died and despite my (and my father's) best efforts we cannot figure out what happened to it, it just doesn't power on, but after replacing just about every component in the power supply it still doesn't work.
 
Since it only cost me about $75 over 10 years ago I think it is time to upgrade to something better especially given it's playing audio for an LG C8 65"
 
It is essentially a home theater room, the TV is mounted on the wall, and there are in-wall wires for speakers (center, front left & right, and rear left & right).
All of these with two HDMI cables run to a small closet on the other side of the room where I would like to put the receiver, the current sub is out of the closet but across the room from the TV.
 
I have a pretty good understanding of audio systems, but unfortunately I just don't have the time to sink into researching a good receiver and speakers.
 
I should note that I am in the US in the northeast
 
My general requirements would be:
Receiver requirements 5.1 channels SPDIF and/or Digital coax (I have a spdif to digital coax already run since the old system did not have spdif in) Receiver nice-to haves Dolby Atmos and DTS:X 7.2 channels Support for more speakers (there are 4 other speaker wires run through the house, two in the garage and two in the basement leading to the closet where the receiver will live) Speakers: Rears small enough to mount unobtrusively on the ceiling Good crisp sound Sub: Self powered Wireless  
Ideally cheaper is better, but I would put a budget on the receiver for around $300 or so, and speakers & sub around $150, budget is flexible, and would probably be bought over the next few months