Brewster Buffalo,
Speedtouch 330 is a USB modem, so a different kettle of fish as it needs a hardware driver.
I can absolutely guarantee you 100% that if you go to a shop and purchase a wired ADSL router, it will talk to any device that implements the TCP/IP protocol (Mac, Linux, Windows ... television, fridge etc) as long as it has an Ethernet port.
All you need to do is plug it in (power, phone line, ethernet cable) , point your web browser to the default web page, enter the default username and password, and configure your settings. No software to install on your computer (but don't forget to check for software updates for the router !).
So in summary, what you are looking to buy is an ADSL router not modem. In terms of brands, look for Netgear as they've been around since year dot and are widely deployed, and thus a very safe bet. Walk (or preferably run !) away from Billon, Belkin, D-Link and any white-label Chinese brands you haven't heard of (i.e. looking at the maplin website, stuff like "Sitecom") !