My recommendation Amiko Viper 4K V20 (new model for 2020/2021).
In my opinion the best budget 4K hybrid satellite receiver currently on the market.
With a price better than Vu+ and Zgemma models in the same class.
Specifications:
Ultra HD DVB-S2X + T2/C
Linux E2 OS (Full support from openATV community)
1.6GHz Quad Core 64 bit CPU Huawei Hi3798MV200
High-Performance Multi-Core Mali 450 CPU
4GB EMMC
1 GB DDR3 RAM Memory