Help with configuring a T61

[spotter]

I'm considering buying a T61, but am drawing a blank on some options.

value in express card slot vs. smart card slot?

value in wireless usb/uwb

which wireless card I should get (options are Thinkpad ABG, Thinkpad ABGN, or Intel of the same, for this, OSX issues might be in play as well. but I'll ask that in the OSX forum as well)

thoughts?