Help choosing new TV Box

Hi Guys,

I'm looking for a new TV box to view IPTV and Movies in HD.
I'm considering the following options:

Beelink GT1 Ultimate
Beelink GS1
Alfawise S92
Xiaomi Mi Box 4k

Although the Xiaomi is the one with less storage capacity, seems to be the best for playing HD contents and with digital sound.
Also, I do like the launcher a lot but what puts me off is the fact that is only 2G/8G and is stuck on Android 6.0

Can you give me your oppinnions?

Thank you