My Powerbooks are a 3400c, a 1400cs and a 5300cs.

M y favorite is the 5300. It's got a great size (for me) even the dual scan LCD is pretty good. I will be upgrading the LCD to the active matrix version just so I can go 800x600. Then a farallon ethernet / video upgrade PDS card and finally a 56MB RAM card. I may or may not bother to do a CF HD for it.