the good part about dsl is the ping times. and another thing is that you can be certain that when you are downloading you will go at a speed of around 90kbps. When i download big files, i get 88 for a low, and 91 as a high, unlike cable which is all over the place. My friend switched away from cable because he would lag alot in multiplayer games, and his ping times werent too low either.
1.5mb is enough for me, heck, even 768k is enough lol