DO WANT TO BUY GOOD RECEIVER WITH GOOD IMAGE SUPPORT?

We recommend the Vu+ Solo2 its a good fast stable receiver for a good price. Install OpenBlackhole in the flash and mount a usb stick

Then use OpenMultiboot and test your way trough images. There are many good images for this reciver.

It also have internal HDD several usb ports, 2 Common interface and 2 softcam slots

There are also several images for this reciver with support for CI+ still out there

4K receiver there is only one choice, go for the Vu+Uno4kSE but as written above no 4K channels to watch about the free channels and some demo

Yes there is Viasat UltraHD and a Canal+ UHD but none of them sends 24/7

Use your money on an HD receiver for now and the 3 choices above is very good budget receivers.