I'm looking at all the options available for connecting my computer to a broker dealer for daytrading...normal dial up via modem, DSL, cable modem, ISDN, dedicated frame relay, dedicated T1/T3 connections etc. The price range of these different options are huge...$20 up to $2500 month. My question is where is the point of diminishing returns? I want the fastest connection possible assuming the cost benefit is there. At what point do I not get any bang for my additional speed bucks?