Ok Im a month behind the times.
Apparently Buffalo is BACK IN THE WIRELESS MARKET in the USA.
See the CES announcement:
http://www.smallnetbuilder.com/content/view/30698/89/
As such they have a WLI-TX4-AG300N which should work perfectly and I get to stay within the Broadcom chip family.
Scott: They should have a N version of the high power router now too...Woohoo!