Mac help

Greetings, I've been thinking about buying a 12' ibook g4, but before I make the big move i'd like to ask you guys a couple of things; first, emulation, is it possible? I'd be satisfied with gba and ps1. second, i read a crapload of manga in my desktop, is there any good(ish) comics reader for mac? (I use Comicsviewer on my desktop)
Thanks in advance

Oh and for the OP: Comix is an excellent comic book reader. It's GTK, but nothing's perfect. http://comix.sourceforge.net/