i've got a Sieg C4 with an X1 mill head.
been happy with it for 18 months, but the hassle in taking tools off (got front and back tool posts) pushed me into getting a new mill.
just got a VM3L from TMTT (they are on ebay) first impressions are that it is pretty good machine.
on the way back from picking it up i had the brian wave to make a bigger ( 250mm x 250mm) table out of some 16mm ally plate, i want to keep the X1 mill head on the lathe because with the powe cross slide i've got power feed on X and Y axis