Hi Steve,
I have the Ho626 model of the Shop Focx drill press. It is a great drill press. the OSS part is pretty slick, you add an extra belt and it oscillates. It does not have the travel of a dedicated OSS but it worls pretty well. The drillpress it self is very good I am suprised how much I use it. It does not have a quill lock that I know of. I just raise the table or hold the quill adjustment to run the nuts down for depth adjustment.
Good luck in your search
Roger