I have a Scangauge II that I had in my 6.0 PSD and transferred into my new truck. It's a great tool and well worth the money. For the amount of data it provides, it's also a lot cheaper than buying physical gauges and a gauge pod and a lot less headache to install. Some guys like how cool the gauge pods look and will say the physical gauges are more accurate, but in my experience, the Scangauge is pretty dang close. Really close, actually.
2006 CCSB Lariat, 3v V10, Oxford White, 5R110, K&N filter, Camper Package, Factory Tow Package, 2.5" Tuff Country front leveling kit, brush guard. Currently: 122,610 miles and counting.