To close this topic
Thank you all for your valuable inputs and sharing your expertise, I have learnt alot
The following is what I went for:
As most recommended, I kept it 5.1 instead of 7.1 but added the .2 for Atmos
1. Got the Denon AVR-X4500H (couldn't resist but to get it lol)
2. Upgraded my surround speakers from QA 3010i to 3030i
3. Upgraded the subwoofer and got the PB-2000 (I got only 1 for now)
*Note: I really loved the PC-2000 pro but its huge, my wife would kill me lol
4. For ceiling speakers I got the Polk Rc80i (it was top 3 in most websites)
5. I got the quiet dual 80mm USB fan for AVR
6. Got a dedicated 4k blu ray player
7. Changed the speaker cables from G&BL 6363 to QED 79 classic strand (not sure if it would make a different, but thought, why not)
I should have all the above delivered and set up in two weeks time.
Thank you again!
Cheers