Execept of Jaca's guide there is also my article, listing all currently supported models by Apple model numbers, screen resolutions and processor clock. It is in Polish, but English translation by Google is not that bad. Scroll to "PowerBook" section.

If you just look for biggest screen and fastest CPU, go for PowerBook 5,9 A1139 model, having 17" 1680 x 1050 display and 1.67 GHz processor.

[ Edited by Krashan 18.09.2012 - 05:54 ]