I can get my full 46 megabit/sec using my Draytek 2820 which is only 2.4GHz - when my neighbours all go to bed and stop using theirs.
I'm tempted to get one of these to add on to the Draytek and set it to 5 GHz only:
I have too much 2.4 GHz only kit, but my personal and office laptops are all dual band capable.
This is the great thing about routers like the DGND3700, simultaneous 2.4GHz and 5GHz Wireless-N networks in one router.
Although, Netgear have released what they have branded "Gigabit Wireless" routers and adaptors now; wonder how they perform in the real world?