Hi Aron,
on dell drivers page I had 3 or more wlan drivers offered for my laptop, I just installed one by one and kept the one that worked. (first I did the clean os install, and followed suggested driver installation order; maybe you should first try without the clean os install).
In my device manager:
Driver Provider: Broadcom;
Date: 21.1.2012;
Version: 6.20.55.31
Sorry for not providing you with the link for the driver, but I'm a bit busy now. If you can't find it, I'll look into it later.
I haven't tried on n router.
Best regards