White Gauges?

I am looking at a White Gauge Kit from NR Automobile Accessories. Check em out HERE (http://www.nrauto.com/gauge_body.asp?id=17). They are 150 bucks. What is the difference between these and the cheap Indiglo ones on Ebay for 40 bucks. I dont want the Indiglo. I actually like these better. White during the day and black at night. Also, Is there anywhere that has good detailed instructions on the installation. It doesnt seem to tough. I am just looking for tips. Thanks.

Got to Bravarian Autosport or BMP Designs to get your guages, then buy the Bently manual for instructions on how to do anything to your car.