Today I bought a new mini-pcie nic for my laptop; a nice Atheros AR5008E-3NX (dual band) based wnic. My laptop already had an 802.11n, but it had a crappy broadcom based wnic. broadcom wnic only could handle 2 antennas, was slower and not compatible with net stumber or other special apps
Now need to buy a dual band PCI, PCIe or USB wnic for family PC, just don't feel like dragging cables.
Finally need to wait for D-link DIR-855, Atheros based Dual band router.
all my PCs will run on 802.11n 5Ghz band 40MHz mode. Will keep 802.11G running on the same router in 2.4ghz mode, for backwards compatibility to my mobile windows phone.
Just sharing my plan.
dual band is the best, 11n will not slow down when B or G device connects. 802.11n 5Ghz 40MHz is the least used mode, no more interference of any type!