4K receiver for 65" LG Super Ultra HD TV

Advice please. 

I need pre-out for the left and right, possibly for the centre in the future. I would also like to be able to swap between 4K and HD if possilbe as I do not like 4k for everything. Also auto set up would be great

I have 52/supercap, 135s and Sonus Faber Olympica Is. 

I use SF Solo Centre and rears and these are fine for my needs

I really dont want to spend over £1,000, less if possible. 

Many thanks in advance