Hi Jeremy
I Have Old ML10 to and have used all kinds of random make Chucks all with no real issues, it's really your cost and requirements.
I now have a small micro 0-3mm chuck from (Arceuro) for fine work, a 1.5-10mm from (second hand) for assorted uses, a 3-16mm (Jacobs secondhand) for the bigger drill/mills and a 3-20mm from (second hand) for large hole which i've found invaluable for use with holding Rota Brooch cutters for up to 70mm hole cutters for bigger bore projects where the brooches leave a valuable reusable core piece for other projects.
all of these are MT2 to suit both tail and head stocks which also match my Drill Press and small milling machine,
the advantage of a selection is that you can leave tooling chucked for multi manufacture parts so you can swap the chuck rather than the tool each repeat.
BAryy