which gauges and why?

or this one: Auto Meter Phantom Series, 2-1/16" Full Sweep Electric Boost/Vacuum w/Peak Memory and Warning (Boost 30 In Hg.-Vac./30 PSI) Full Sweep, Stepper Motor meter movement. Includes 8 ft. tubing or wiring harness. Includes MAP sensor. Includes T-fitting.

i'm thinking i'll need the electrical one for the new amp sensor especially but i'm not sure . . . or should i just ask Ed at LM Speed about it?
Also the guages can scan for trouble codes and delete them, and you can program a shift light too. Just my .02
http://www.genosgarage.com/products.asp?dept=95
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