I used to have Comcast cable and it was very unreliable... I had an outage of some sort every few weeks. I spent years working with both Time Warner and Comcast to try resolve the issues, but the problems continued. I switched to DSL almost a year ago and haven't had a single problem. The DSL is more expensive and it has slightly less bandwith but not enough to make a difference; you don't need that much bandwith to trade, even if you're scalping (although I don't trade that way). The most important factor to me is reliability, and for me the answer is DSL.
