New Project........questions on appropriate motors and drives.........

Well, finally starting a new project.
Just acquired a PrecisionMatthews PM-940V to convert to Linuxcnc CNC.
Though I thought I had it all sorted out, I'm questioning my selection of motor/drives.
Was going to take a leap and use a trio of Chinese AC servos, probably Lichuan brand, maybe Delta. I've corresponded with Lichuan and they have been quite responsive and helpful.
Just the other day I got word that I might be able to pick up a few Granite Devices drive, the slightly older VSD models, but pretty close to NIB, for a really good price.
And I came across a trio of older ElectroCraft E703 motors, brushed, with tachs. Really good strong motors.
So now I'm in a quandary over the motor/drive choice.
AC servo and motor combo, or old style DC brushed with Granite drives ( or Advanced Motion Controls pwm amps).

Question? has anyone actually used the Chinese AC servo/motor combos for a complete conversion? all 3 axes?
If so, which make and model? How are the drives working out? Complications? Unusual problems?

Question? same as for Granite Devices drives? AC, DC brushed, or BLDC motors?

A little help would be appreciated. Don't hold back. All opinions and experiences are welcome...................

Noel
(IRC: Roguish)