Need Help Deciding & Finding

[SmithOCE]

hey so im currently running a 1 monitor setup, monitors an Optix G27c2, im looking to either but a tv to mount onto my wall that i can kinda use as a monitor cause all i watch is youtube, or a second monitor which i might turn into my main because i have a few lines of weird pixelation things running across my whole screen so im looking at using this as a second monitor, i need help deciding and knowing what would run good, not looking for a 4k tv, just a bigger screen to mount to my wall. if anyone knows any cheap tv;s anywhere or cheap 144hz or higher monitors please let me know, my pc is decent, its a rtx 2070 with i7 6700k, 16gb of ram and z170a krait gaming x3 motherboard if that helps