Gauges for what? It doesnt look like you have many mods.....are you just tryijng to make it look "cool"? On my built setup, I have a wideband, boost, fuel pressure, oil pressure, and heat exchanger temp. They all serve a specific purpose. I didn't put any gauges in until I had a supercharger and needed the wideband and boost gauge.
If you really want a gauge, I think a vacuum gauge is pointless unless it has a boost side to it. Look at something like the Aeroforce gauge that plugs into the ODBII port, and displays parameters of the car. It does have some programable inputs as well.