Thanks for the reply! I think I'll buy an Xiaomi AX3000T from Aliexpress now, I can get that for 40€ just like the Archer C6 from Amazon, but it seems it has much better specs, though reading OpenWrt support for Xiaomi AX3000T it seems there are still some driver problems surrounding the 160MHz channel-width feature and as of yet there seem to be only snapshot builds available.