Here is a link to Streetrodding forum that did a great job of summing up what's out there and the merits of each system.
http://www.streetrodding.com/index.c...Thread/id/1525
I'm going with American, because it's not preterminated, you wire what you need as you need it! No extra wires hanging around until you add say AC or radio. Plus the prices are quite variable, their 22 circuit highway kit, goes for as low as 360.00 on the web, maybe cheaper if you search more than I did. Biggeset complaint is it has a big fuse board for small applications. O.K. with me in the truck. I also like the guage disconnect so you can bench wire all of your guages then install and snap the connectors together! I talked with the owner on the phone and he was quite friendly and helpfull. For what it is worth, Steve.