The Phase Perfect is obviously the better choice, it retains much more balance on the generated phase compared to VFD which can in some cases drop voltage on load.
Although for RPC's I only have experience building and tuning them, not the off the shelf versions.
The single phase loads I refered to would be in the control cabinet, motion controller etc , not external ones.
Incidentally what is the nature of the 3ph loads, if only for the spindle, some have used a standard VFD for this and fed the rest from the 240v 1 phase.
Al.