034 I think you refer to Nema 34 size. Xylotex uses max of 35V DC and 2.5A. I have size 34 frame motors and one set of the motors would not work with the board. Another set of motors will work with it if the amps are below 2.5. As for servo controller Gecko's or Rutex. For servo motors you could use these
http://www.automec-direct.netfirms.c..._dc_motor.html You must add the encoder. Jeff from homeCNC reserched and added encoders to them. He use to sell them complete with encoders really cheap. If he is using them then they are good.