I completly agree on the keling and gecko parts.
G540 3 axis package (One G540 + Three
KL23H284-35-4B (1/4” Dual shaft with a flat) 387 oz-in + one KL-350-
48 48V/7.3A 115V /230V power supply: $494.95
Mach3 for 149$ when ordering with something else.
throw in a estop 10$, some limit switches 3.29$ x6, parallel cable 8.95$. and get a really good package for less than 700$
Use your extra 300$ for motor/limit wire, paint job, extras, etc..
All above is at kelinginc.net
Ive had really good luck with this same kit on my 4'x4' build.