which OS ? XP or 2000 ?

I need to get a new box and Tiger Direct has a couple $200 machines,
some have XP, some have 2000

I plan on using Mach3.

Any suggestions on which is easier to use ?

which is more stable ?

I currently use XP and hate it as compared to 98se

I am more of a user than a programmer, so some of the problem is that
I don't know how to keep some of the XP 'features' like stickykeys
from loading and clogging the works.

Dave