Jeff, I have a Minolta Spotmeter F. It's pretty nice. The feature that I use a lot is the memory that allows you to take several readings. It shows the results graphically on the LCD display. As William Robb mentioned, it makes zone system calculations really easy.
Here's an example taken with my Century Graphic with the aid of my meter: http://www.westerickson.net/mark/misc/PennerLake.jpg --Mark
