There are choices, you can go with a billion 7800n, they released firmware that handles sky MER; Or you can just set up the sky router to pass all and use whatever you want.
It's not only the MER bit that's different, sky do something with the DHCP on the exchange side also, so the router needs to be able to handle that. Currently sky only use username|password combo for authentication, but they could, and maybe will do, also use mac address, so make sure your new router can spoof that too.