large_diver
Contributor
Look at the Uwatec master diver SPG. Expensive, but it's the most precise, easiest to read gauge I've seen. Markings are in 50 psi increments. Face is luminous/glows in the dark. comes with boot, but can be easily popped off if your heart desires.
http://www.extreme-exposure.com/acc/gauges.shtml
http://www.extreme-exposure.com/acc/gauges.shtml