I have used USB on my previous computer, but when I had this one built I included an ethernet card. This was due to the general consensus on previous threads that this was better. I cannot say that I have noticed any difference myself, but then I didn't really expect to, as this computer is like a ferrari compared with a trabbant when compared with my last machine. It is a pity that it is now so difficult to do a site search since the changes, but I do seem to recall a large majority of all the site egg heads, came down on the side of ethernet. I myself discssed it with an NTL engineer, and he said go for ethernet. DO HOWEVER remove your old dial up account first, as many have experienced conflicts, I did on my old machine.