If porting to x86 is actually planned it would make good sense to choose HW that will still be easily available and identifyble by the time they are actually supported in the public ISO (which can be anything from 1 to 3 years after such a port had been started).
It has sofar also been a fact that (Intel-)Macs either show catastropic fault early on or last allmost forever, which is also good as we would be most likely be buying 2nd hand anyways.
