when I bought my milling machine (sieg SX2) I didn't really know what type of vice to get , so ended up buying one of those ground all over precision tool vices on the grounds that
a) the clamping jaw won't lift , and
b) it should be easy to tram-in
but frankly , for 99% of the work I use it for, I just use a 6" M&W square and the edge of the table. this gets me to less than 0.01mm runout.
It's rare now for me to even check it with a DTI , only if the job warrants it.
peter