Taig -vs- Sherline Mill for CNC Conversion

I have decided to go with either a Taig or Sherline mill for my
conversion. Question is, I have an older 5000 series that I could
update with new motor ect..... Buy a new 5400 or 2000 series CNC
ready Sherline( can't help wondering about how rigid the 2000 series
mill is.(comments welcome) or go with a CNC Ready Taig (comments
welcome)

Will be using driver board from Stepperworld with 118 oz steppers.

Any and all comments welcome.

Regards,

Alan Trest
Pensacola, Florida