TV/AV upgrade questions

[Robzere31]

Right, this is probably a bit of dumb question but bear with me!

I'm looking into a new TV, 4k around 48-55" budget hasn't been decided yet but I'd guess around £1500- £2000

I currently have a 40" 1080p Sony hooked up to a Sony 810 amp. Also connected to a skyHD box outputting in 1080i
I've been happy with this setup for sometime but here is the question.

If I get a 4k TV, would I be best to upgrade the amp at the same time to something that supports 4K?
I will in time be upgrading to skyq but that won't be until November when my current deal expires. Until then, the content being fed to the TV will be in 1080

I have my eye on the Denon 2300 av amp if that helps.

 

[Robzere31]

Funny you should mention an LG, I've been looking at the LG oled55b6v for around £1600
Not planning on using a console or PC via the TV.

I was concerned that current 1080i feed from the skyHD box wouldn't look great & feeding it to a newer av amp such as the denon 2300 the picture would upscale to 4k.