I have a ScanGauge E, it's OK- I bought it as I was preparing to take delivery of my D2 as I didn't know about the Ultragauge at the time. The big issue I have (hind sight being 20/20) is that the Scangauge E doesn't have an alarm feature. This bit me big time a few weeks ago when I overheated but didn't know until I saw the dash temp gauge raise and looked over at the Scangauge and saw a way too high number...

I'm probably going to replace it with a scangauge and put the ultragauge in my Subaru for kicks and giggles.

 

I love my Autometer. I can set a max-temp warning light.

1) Auto Meter 3654 2-1/16" 100- 260 Degree F Full Sweep Electric Water Temperature Gauge

2) Auto Meter 2205 Black 2.025 Diameter Omni-Pod