That looks just like the FL86STH65 that im sure works out cheaper from MCP or Zapp. I have one of the CNC kits from MCP and am very happy with the drivers and motors -but am yet to have it driving the machine so im not sure how well they perform under load.

I have 4.5Nm for X&Y, 12Nm for Z (and hoping i got the selection right)

hope this helps