I moved house recently and my new line is capable of the full 80/20 which meant I was geting close to the limit of the Open Reach Modem's 10/100Mb LAN port.
There wasn't much choice of modems, a desktop Netgear DM200 £33, and a more useful wall mountable Draytek Vigor 130 £80.
I'm sure you can guess which I went for!? Yeah, the Draytek! It's now neatly mounted on the wall behind my desk.
So far it's been great, for most people it will be plug and play, but I had to move it to a different subnet.

Long story short, I wish Asus would make a VDSL/ADSL Modem to go with their routers! lol!