personally if it were my car i would go with boost, fuel pressure, and either egt or oil temp it's all really based on personal preference other options could be water temp or air/fuel ratio like i said its all based on personal preference good luck with your car

 

My gauges...



-Defi-Link Control Unit II

-Defi-Link Display Kit

-Defi-Link 3 1/8 Tachometer, Black

-Defi-Link 2 3/8 Boost Gauge, Black

-Defi-Link Oil Press. Sensor Set

-Defi-Link Fuel Press. Sensor Set

-Defi-Link Oil Temp. Sensor Set

-Defi-Link Water Temp. Sensor Set

-Defi-Link Exhaust Temp. Sensor Set

Tach, Boost, and a multi display system Maybe thieves wont be as interested lol.

 

Damn!!! Can you even see the road with all that information in your face? lol

Your car must look like a jet with all those gauges...any pics???

 

Boost then EGT