another vote here for the iCurve, Apple BT keyboard and mouse. My 12" iBook looks great and functions even better on the 'curve. Writing was such a (literal) pain on the iBook, what with the keys so close together and the screen way down there. Plus that noisy space bar was starting to drive me crazy. Now, the screen sits perfectly at eye level, the keyboard is comfy, quick, and quiet, and the mouse, um, works like a mouse.
I thought about a desktop monitor, too (heck, I've got a 23" ACD at home!), but this setup leaves some space for me to use my desk for some other things, too.
As a great Monday Night Football announcer once said....
"That's just my opinion. I could be wrong...".
MFK