LG Handshake Issue at 120Hz on Series X

No, unfortunately, one cannot speak of clarity in this case, because I have experienced the exact opposite case.

I own the LG C1 and the LG C2, and the handshake problems have NEVER occurred in over a year of use on the C1! Instead, however, they keep coming back with the C2 on the same Xbox Series X console. When switching this console back to the C1, the same picture again, NEVER! LG C1 and LG C2 both support Dolby Vision (for gaming). Before testing the LG C2 with one / my Series X, I had never heard of the handshake issue with Dolby Vision. Besides, the LG C2 works very well, but the Dolby Vision handshake in games can hardly be tested on other devices, because the PS5 does not support this feature and other devices are at least unknown to me.

I have a lg 4k tv with hdmi 2.0

That will work fine with Xbox Series X,

However you wont get the 120hz refresh rates at 4K, as that requires to have HDMI 2.1, other than that your TV is fine to use, if your not to bothered about 120hz refresh rates at 4K as an issue for you, there's no need for a new TV.

…LG C2 vs Xbox Series X no signal issues…turn off Auto low-latency mode on the Xbox series x…it’s conflicting with lg c2 Auto low-latency mode…

If it's only just for use with the Series X, I would opt for a TV, A 4K true 120Hz TV...

This would be the 4K TV, I would personally go for at a minimum, If pairing with the Xbox Series X...

Amazon.co.uk - LG C1 - 4K - 120Hz TV - There is the newer LG C2 model but it would cost more.

With a 4K monitor, you'd really need to get one that has HDMI 2.1 ports for it to work flawlessly with the Series X, Though that would mean it'll be a 4K 144Hz monitor,

With the Xbox Series X only being able to output a maximum of 120Hz, A 144Hz monitor can be a bit of a waste due to not using the monitor full potential, unless it also being used with a high end 4K high refresh rate gaming PC, never the less it will still give you 4K at 120Hz...

This would be the 4K monitor, I would personally go for at a minimum, If pairing with the Xbox Series X...

Amazon.co.uk - Gigabyte M32U - 4K - 144Hz Monitor

I personally use a LG 27GP950 4K 144Hz monitor with the Series X, But i also use it with my high refresh rate 4K gaming PC.

Not knowing your budget, The TV and Monitor i linked, I wouldn't go for anything less personally, without compromising the gaming experience too much.

Right now I’m on a 42 inch Samsung QLED 4K HDR set, but before the Series X is out I’m planning on upgrading to the LG C9 or CX in 65 inch. I need that HDMI 2.1 120hz OLED goodness in my life.