Which Wireless-N Routers are compatible with Apple products? I have an iPhone 4, iPad, and MacBook Air, all of which support Wi-Fi 802.11n. However, there are many routers out there that were created before the official N spec was finalized (e.g. those based on drafts). How do I know which routers will be compatible with my Apple products?
The simple answer is buy an Airport Extreme

Otherwise use the internet and read reviews.  Virtually any draft-N or official N spec routers will 'work'.  As with anything, the only way to be absolutely sure is to try them out.