Ask yourself if you REALLY need the builtin wi-fi.
Our company standard calls for a minimum of WPA-PSK for wi-fi and we use the SonicWall GVN. Any dropping of the link means the user has to re-login.
I ended up going with a dedicated Wi-Fi card because the built-in Wi-Fi is on a USB hub/chipset and USB devices (printer & web cam) were causing disconnects.