I've used a number of G0704s and one PM25. They're night and day. The PM25 has its little shortcomings, but it's like buying a new German made AUDI versus a beat up old Mexican made VW. You can tune up a G0704, but the PM25 comes already working better than most tuned up G0704 machines. I find it to be a little more rigid when it comes to taking larger cuts, and the belt drive is a dream. For the CnC conversion, I understand it's a lot less work for the PM25 since there is enough room under the saddle and you don't need to mill a pocket for the ball nut. Unfortunately the PM25 kits are more expensive and harder to buy. I think if you are stretched to every last dollar, get the grizzly, but if you want a better overall machine, get the PM unit. That's what I did.