my wife and i were in the same boat. i told her she could get a PC if she wanted it, but i wasn't supporting it, period.
she did, and it's sitting unused in the corner somewhere. i really need to get her another iBook or PowerBook, but we'll have to see on that. (she didn't use the old one all that often, and it still had a high resell value).
in any case, i know exactly how good i have it. i support PC's and Macs at work all day long. i hate PC's.