Good ones don't come cheap:
http://www.mitutoyo.com/pdf/DRO_Promo.pdf
http://www.atechauthority.com/products.asp?id=550
I hear of people going to DRO Pros, but I know nothing firsthand about them. Sony and Mitutoyo I use. Accurite is another, but not sure they are still made.
I have DROs on both lathe and mill, really would rather not do without them. On the mill I have the touch probe for edge finding and centering, very handy.
I have Easson which is a brand that DROpro sells. 2+ years old and going strong. The manual is written in Chinglish though so, be prepared for that.
:rofl: I'm actually starting to understand that.
Thanks