I'd recommend you get an Intel card.
The RealTek cards are junk. They're junk under Windows, and they're *very* buggy junk under everything else. It's not even a question of community drivers being problematic -- RealTek's own drivers suck mightily.
Intel's cards are relatively cheap, and they work very well under Linux and Windows.
Need help with Linux or FreeBSD? Catch me on IRC: I'm ThinkRob on FreeNode and EFnet.
Current laptop: Lenovo ThinkPad T420 (running Debian Wheezy) - kestrel [pending retirement]
Current workstation: IBM Intellistation 9228 (running FreeBSD 9.1) - blackbird