Hi all, i recently purchased a new home and it came with a dedicated home theater room. I have a tendency to always want the biggest and best. I understand that is not always the best thing to do when building a home theater. I attached a diagram of the room. It is not a huge room. I am looking for some help on a couple things Subwoofer, receiver and possibly adding speakers. What I have (2) Polk floor speakers (1) Polk Center speaker (2) Pold surround speakers. I am happy with these speakers. I am looking at the Denon AVR-X4400H. It has 9.2 I am wondering if I need that many speakers given my room size. Also I do not understand Dolby Atmos and DTS-X. Do I need top firing speakers for those platforms? Can I put all nine speakers in that room? Am I overpowering the room? https://usa.denon.com/us/product/hometheater/receivers/avrx4400h Subwoofer I am planning on building a subwoofer box with the ultimax 18. With an 8 cu foot vented box. That will sit behind my theater seats. I will also use a rack amp 1000 watt at 4 ohm. Not sure which brand or anything yet. I am sure this will give me some great bass and vibration but I am also worried I may be overdoing it. https://www.parts-express.com/dayton-audio-um18-22-18-ultimax-dvc-subwoofer-2-ohms-per-coil--295-518?gclid=Cj0KCQjw6rXeBRD3ARIsAD9ni9A6BSPoNzMUIRAph473LvPWRs5KjrfF0dH2GlkMjJSPA9PmJr6yY1MaAioFEALw_wcB I plan on getting the Epson 5040ub with a 125" 2.35:1 I want to have a blow your mind home theater experience!!! Any help would be appreciated!!!