If you are looking for a small mill that can be simply converted to CNC in the future then the one I have is a pretty good one. You can get just the mill with no CNC for around $500-$600US. The CNC conversion is another $1,000. This is the one I got
http://www.acumotion.com/5400CS.htm well mine is a little different. Looks like they upgraded the stepper motors.
This is just the mill by itself.
http://www.acumotion.com/mill.htm
You can buy it there for $618 or I think from
http://www.sherline.com/ which is the original manufacturer of it.
It is simple to convert to CNC as there are already a few different kits made just to do just that for it. This mill is better than the Grizzly one but still not great. I like it though. You can probably find a better manual mill though for $600, but it will not be as easy to convert to CNC in the future.
Another good link to browse.
http://www.desktopcnc.com/