Could someone please advise me as to wether I would benefit from either of these devices. And which would suit my needs most. Or do I need either!!?! Basically. I own a new 21" imac connected via Ethernet to my modem router. An ipad ,iPhone 4s, Apple TV and Xbox all connected over wifi! Connection via wifi is pretty good considering it is only a DLINK DSL 2640R G wireless modem router! I very rarely lose connection. Even when playing games on my Xbox or downloading. I even transfered all my data across from my pc to new imac via wifi! The problem in having is mainly with my Apple TV with buffering issues and airplay (ipad or iPhone to TV)! Music starts to stutter and cut out after a few minutes. And sometimes the remote app struggles to connect or find my itunes library! Prior to getting Apple TV all my music was streamed to my AV system with no problems at all! I have phoned apple a few times for advice. But no one seems to really be able to explain the problem. Or tell me the difference between the express and extreme! I should point out that I live in the middle of a row of 3 small cottages in the country. And wondered if it could be that I'm picking or getting interference from a neighbours wifi. I'm quite willing to buy either of the mentioned routers if anyone thinks they might sort my problem out! All I know is that the extreme is supposed to be faster than the express! Again I would appreciate any input. As I don't want to waste money unnecessarily!