Wireless hardware is very much a person preference. I would recomend Netgear, my complete wireless network at home (yes i am sad) is netgear and works well. One rule of thumb, try to stick to one manufacture. Although they should be compatible with each other, it makes things must simpler. I would recomend the Netgear WG511T PCMCIA card, i use it as my roaming card and is currently connected to a number of access points, very good range and compatibility.
Ross.