THinking of buying a new box

Out of the 3 you mentioned, i'd go for the Zgemma star h1 because it's a mips receiver.
Support from openatv,opendroid and italysat (according to their website)

Quote

http://zgemma.com/h1.html

My Old stb was Gi_Ge 8120.
I just upgraded to Amiko Alien 2+ triple.

First impressions Amiko Alien 2 triple is much faster.
It can do a lot more and better.
Looking forward to playing around with a lot more plugins.
Will take a while to get used to it.

I want to buy one too, but to be honest, I don't know what to buy.

I searched a lot in google, but there are so many...

Zgemma H1, I would not bother, ive had 3 and 3 are a pile of rubbish, the cable tuner is weak, the satellite tuner will not hold positions on usals or 1.2, sent them back but the seller maxking sends them back as he says in working order but stll the same problems.
Steer clear, ok if you want uk cable and 28.2 uk sky, but why have 2 picking up only uk tv as it cannot hold its sat position (memory) when switched off and back on.
Summary, rubbish and a waste of money.