It almost grieves me to say so but the Zoom ADSL 5510 USB modem currently sold by PC World and Currys is actually rather good, to coin somebody elses ad slogan it does exactly what says on the box.
But oddly, when I was questioning their service dept recently it turns out to be sourced from that rather well known company for modems...Hayes.
But highly recomended anyway.
Experience; is something you gain, just after you needed it most.
When faced with two choices, simply toss a coin. It works not because it settles the question for you. But because in that brief moment while the coin is in the air. You suddenly know what you are hoping for.