After years of messing with different home networking setups (and some small client installations) I would recommend Netgear - they seem to be pretty robust and sensible, in a 'you know what you're getting' kind of way - drivers work as expected etc. They are nothing special, and as stated above 3com/Intel probably have the best cards but for a small/home office setup I'd go with Netgear every time.
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Rory
MkIIa, blue lit buttons, memory upgrade, 1Tb in Subaru Forester STi
MkII, 240Gb in Mark Lord dock
MkII, 80Gb SSD in dock