Atheros/FreeBSD/kismet question from a wireless newbie

Hi everybody,

I'm looking for a good 802.11b card to do some wardriving on a laptop 
running FreeBSD. I'm a complete wireless newbie, but from what I know 
I'll need a wireless card with a connector for an external antenna and a 
card that supports raw monitoring mode (that is what the kismet README 
told me). The kismet README also told me that the chipsets known to work 
on FreeBSD are: atheros, prism2, wsp100, drone, wtapfile, and pcapfile.
Does anyone have a recommendation for a card that uses one of these 
chipsets, has a connector for a pigtail, and is inexpensive?

Thanks in advance,

Douglas Richardson
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