As i searched and compared several stores on the internet that i think the PIPO TV Box is the best choice to buy from PIPO Store with a cheaper price compared to the Mi Box. There are several models in stock for the PIPO Tablet, and give me the deep impression is the PIPO X10 Pro with a small built in fan, although the PIPO X12 also comes with the fan, the later just use win 10 OS while the former equip with dual OS. More detail information you can look at here:

PIPO X10 Pro