Call me crazy, but I would get the cheapest, so here's for 13$:
I got an USB WIFI 54Mbps noname thing, holds 4MB/s with my DSL router located around 12 feet and one wall away from the rig.
If in your area aren't important electromagnetic perturbations (like living close to GSM antennas) anything will do.
My 2 cents.
*EDIT Here's for 18$ a card with 419 buyers and good reputation:
I was also looking at the Gigabyte card. But the shipping kills me...
If the card is doa or not strong, then I'm basically stuck.