are all gauges created equal?

[meltboy11]

Going to be buying an aftermarket boost gauge soon. Are some better than others, and how do I hook it up, I assume just run a vacuum line either through the firewall or the door trim into the car?

[flybynite]

Going to be buying an aftermarket boost gauge soon. Are some better than others, and how do I hook it up, I assume just run a vacuum line either through the firewall or the door trim into the car?

Here is the one I use.
http://cgi.ebay.com/ebaymotors/Autometer-Ultra-Lite-Turbo-Boost-Vacuum-Gauge-4303_W0QQcmdZViewItemQQ_trkparmsZ72Q3a1205Q7c66Q3a2Q7c65Q3a12Q7c39Q3a1Q7c240Q3a1318Q7c301Q3a1Q7c293Q3a1Q7c294Q3a50QQ_trksidZp3286Q2ec0Q2em14QQhashZitem270354146500QQitemZ270354146500QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories
I drilled a small hole over by the CMC and hooked up to the map sensor with a vacuum tee. I got power for the light from the light switch harness. Found the dimmer wire and hooked the positive side up to it and grounded the negative..