I've just had FTTC enabled. I'm getting 70Mbps down, and if I put my Billion 7800n wireless router in wifi-N mode, the wireless N devices enjoy the full 70Mbps downstream speed. Unfortunately, I have two G devices, so I need G+N mode... but as soon as the G devices connect they slow down the N devices. I understand this is expected behaviour with most if not all routers out there.
I'm just wondering if there is a router in existence which lets you connect G devices without slowing down N devices.