Those Infineon FETs are likely a good choice, I've found their devices reliable in SMPS applications. They do however have a pretty huge input capacitance so you'll need a driver chip with plenty of beans like the ONSemi FAN7191. Going back to my original suggestion, rectifying & smoothing the mains to give ~325V @ abou 5KW will need some biggish capacitors which will draw hellish charging current spikes from the mains - using smaller caps that don't charge all the way when under load might make Powergen rather happier, but will of course reduce your available power - on which subject does the Bridgeport have pulleys connecting the motor to the spindle? Obviously at lower voltages you will get lower motor RPM.