A-B is a good choice,and I use the entire range of their drives, but holy jebus are they proud of their equipment. Solid state drives don't die unless you do something stupid like configure it for thirty times the motors current limit, or douse it in water. I've got a 165amp (fla) motor at work that the knuckleheads max out to 1300amps continuous about twenty times a day on a two year old AB powerflex drive. It doesn't even get hot. It will disconnect the SCrs and save itself in milliseconds. 5hp motors are easy to find drives for with 3 phase converters. You could also get the frame number of the motor and get a higher HP motor to offset the power loss. Just rattling off ideas here. Good luck with your machine.