4k seems a bit high in my opinion. that machine should have steppers and would make a good conversion candidate for retrofit to mach 3 with one of Hillbilly's Interface boards and instructions. He is on the Mach3 boards and lives near knoxville as does poppabear who is also on the mach forums.
artsoft controls has a website
there is a mach3 board on CNC zone
and one on yahoo as well
I guess what I am saying is 4k is a lot to me and if I were to purchase that machine I would plan to convert it to PC control with Mach 3.
I am currently working on a Boss9 servo machine model R2E4 that I traded for because it is a servo machine it is more diffacult /expensive to retrofit. with the stepper machine you can re use some of the electronics.
also the spindle on that machine would be either NMTB30 or quick switch 200
archie =) =) =)