Which fuel pressure gauge?

[tonypagnano]

My truck is coming home from the tranny shop friday, and the first thing im goin to do is buy another tranny cooler and a gauge. While im getting the gauge i need to get a new pillar mount because i only have the two gauge mount. I want to get the 4 gauge pod and add the trans temp gauge and a fuel pressure gauge. I just have a few questions about fuel pressure gauges. I noticed that mechanical gauges are way cheaper? what fuel pressure gauge do u recomend i get: mechanical or electrical? 1-15psi, 0-30 psi, or 0-100psi? late 99 7.3- intake, exhaust, DP tuner, ITP boost anhilator. Thanks