Hi,
the cheaper all-in-one board from robotica has two disadvantages
1) the maximum voltage of the drivers is 36V so the steppers will be faily slow, 50V is better,80V is about as
good as you'll get
2) if one of the driver chips blow up, and they do, and you can't fix it you'll have to replace the whole board.
The multi board combination is better, you can add better drivers later if you want or replace one if it fails.
The motion controller does not have backlash compensation or THC. Have a look at CNCdrive products, they
are advertised and popular in the US but are in fact a Hungarian company, you may get them cheaper than then
the Yanks! The UC100 is cheap and has both Mach3 and Mach4 plugins. The UC100 bigger brothers have up to
5 ports worth of IO but do not have a Mach4 plugin yet but are highly regarded as Mach3 capable.
Craig