Mike sounds like you want a little show and a little go.
I'm still waiting for a reply on the Tanabe.
Autometer are the most economical and has the biggest variety of looks. Boost gauges at least 60mm or in the case of autometer your choices are 2 1/16 or 2/ 5/8. The bigger the gauge the better the motion. Smaller gauges tend to be erratic with their movement. 20 psi should be fine but 25-30 will be better. You never want a gauge that reads at the top or the bottom of it's range. Mechanical or electrical will work. Mechanical are cheaper.