At some point you will have an issue with one axis or another, you could save a lot of grief and make fault diagnosis far simpler by buying separate break-out board (with spindle control options) and axis controllers.
I started with a 5-axis integrated BOB/controller and never got one with all 5 axes working properly, after a refund I remembered why I like seperates for HiFi - one bad unit doesn't scrap your whole system, you can swap-out to locate a fault and if something is really important you can keep a spare and use it without messing with the bits which work.

- Nick