Welcome back, yes I see you have not posted in awhile.
Tricky question at this point in time.
No body has yet to produce a solid 4K receiver that does everything else fine.
I have a couple different flavors here and one I am testing, but alas it is not yet ready for prime time itself.
If you are wanting something that is good at IPTV and DVB-S2 in general. .... Side note, almost all signals have went to DVB-S2 now.
The Manhattan 1978 would be a good choice if you do not have motors in the mix, the 1978 still needs work on this.
Also the Linkbox 9000i would be a good choice. Neither do 4K, but are good performers.
Both can be found at
www.hypermegasat.com.
For 4K I would so some searching on the site and read some of the past recent posts on 4K.