Based on your comments, I would say the PM-30 would be more optimal. Just going to a 2HP motor at 240V will make a significant improvement, and the belt drive will be quieter and more adaptable to CNC if you ultimately go that route. Although the CNC route requires a lot of other considerations and costs, so I would look at the immediate needs. Having the increased capacity in the different axis is very significant, it is amazing how fast you can hit the limits of your Y and Z travel. In particular when you add a vice and DRO scales, which can reduce the Y/Z travel. If one is machining smaller parts, I still think the PM-727V is a great all around mill for the size and you are limited to 120V. Years ago I ordered a mill from QMT similar to the PM-30, but due to delays I purchased a BF-30. It had similar travel, was about 200Lbs heavier and had a 3Hp BLDC motor. I never had an issue with power, but it used a 3 speed gear head which was fairly noisy at the higher speeds. I learned a lot using the mill and had a better understanding of the travel limit issues. I rarely used speeds above 2400 RPM, even for aluminum, but the increased power allowed significant meatal removal using a rougher end mill. If CNC you often use smaller end mills and much higher speeds. Most CNC conversions replace the motor and extensively modified the mill.