All are 3HP, 220V 3-phase output
TECO FM100-203-N1, $295
TECO FM50-203-N4, $407
TECO FM50-203-C, $245

I have two Teco units and they work fine. I have a 1HP unit on my
surface grinder and a 2HP unit on my rockwell lathe.
I bought both from Dealers electric and the support has been fine too.

I don't have any experience with others such as Hatachi, but I chose
the Teco over the Hatachi because I thought teco had a better enclosure.
Not sure this is really the case though.
I also found it easy to order them from dealers electric.

chuck