i've used a few d-links over the years without any trouble. of the two you've mentioned, go for d-link. but this isn't to say that d-link compares with the likes of 3com or intel. i used to think that once you got a card configured and working, all was well no matter what manufacturer's card you're using. then i had a couple of realteks up and quit on me for no apparent reason. the bottom line is, like most things, you get what you pay for. your application may not call for spending $80-$100 per card for 3com or intel quality, if so, buy the d-links and be happy.
glenn kennedy