Hi All,
Well after much indecision I finally bought the new milling vice and settled on a screwless type shown in the photo.

Have to say I wasn't sure about this type of vice but there have been some positive reviews on here so I took the plunge and bought one.
Initial impressions are very good. A good size for the SX2P, it takes a little time getting used to the procedures for adjustment and tightening but once you do it's really simple to use. This one has a 63 mm wide jaw and 1/4 turn of the 6mm. allen key gives a powerful grip on the work with no jaw lift.
It's similar to the ones sold by arc, and a bit more expensive. The relief at either end, is a feature I liked and which makes for an easy longitudinal setting on the table. It came from Germany, but was made in china, like many are!
Geoff