I read your Concern mate , do not dive in the FOV and PPI dilemma , If you like playing on Big screen like me. Look for the overall comfort and immersivity level.
Simply keep your 2160p TV or Go with a new one 55" ( at least) 2160p Real HDR 1000. Wall mounted ( with a flexible mount)
For the 144hz monitor go for a 1440p 32" 144hz like the BenQ EX3203R 1800r Curvature or the Dell Alienware AW3418DW. 34- inch 21:9 - 3440 × 1440p 120hz 1900R Curvature.
For the Ram
2333mhz + 3000mhz , as you have 2300mhz go for a dual stick 2 × 8 3200mhz CL 16 Rams, a sure benefit on the min fps and frame pacing.
Higher the frequency the more diminishing returns on tighter timings. The higher up you go on freq the less impact latency has.
DDR4-3200
@CL16
16 * 20 / 32 = 10
@CL19
19 * 20 / 32 = 11.875
DDR4-3000
@CL16
16*2 / 3 = 10.67
@CL19
19* 2 / 3 =12.67
Latency refers to the delay that occurs in data transmission as data moves between computer RAM and the processor.
https://youtu.be/_QMeTdK6e4I