Well you don't need to have regular phone to have DSL.Most of the apartment have Telephone lines right???you can have their service thru the number but not have phone service. Anyways ..in cable there is lot of interference problems but not in DSL. And normal Cable is generally faster than normal DSL.I have DSL and i pay $$ to get 48MBPS i would have got better package deals but i just left it . It is always good to go with package deals..whether DSL or Cable.