I run my Taig with a Hobby CNC, 36v psu and 270 oz-in motors. Rapids at 45-50ipm depending on how wells the ways are oiled...
The major con of the HobbyCNC controller is you have to assemble it yourself...Hope you're handy with a soldering iron. I personally didn't have any problems but I've heard of several damaging the chips because they waited too long on the via... The controller is a little hard on the steppers at low speed (they make a lot of noise, this'd be the midband resonance that the gecko's get rid of). The board isn't opto-isolated either so its possible, but rare that you may get a voltage spike back through the board and possibly damage the parallel port on your machine.
The HobbyCNC is limited to 42v input, so about the best you can do is a 36v power supply, this will severely limit your performance, for instance my motors to would like 48v to run at optimal power, so I'm losing 25% of my steppers top end performance right there. Most mid range nema 23 steppers except for the extremely small ones will want around 50v.
Personally, it may sound strange, and actually more expensive, but if you have the money, get 3 of the Gecko 203s and an opto-isolated breakout board. It may be years from now, but you will want a bigger machine, and when it comes time to convert it, you will already have the necessary drives to do so.