You're very welcome Mav. So here's a bit more to think about for DSL. Both Cable and DSL work by sending additional signals along with what they normally had. The difference is that they're using frequencies to carry the signal in different ranges than the normal service (either TV or voice, obvioiusly). Now, cable uses coaxial, which is typically a thicker and more consistent medium than twisted copper that your typical phone uses. Now, by consistent, I mean that it's purity of copper in the wire tends to be better than a typical twisted pair for a house.
Why? Because cable has only existed since the early 80s (so about 25 to 30 years) while copper phone wire has existed for over a century. Earlier/older phone installations will have worse copper purity (and therefore be really REALLY bad for DSL). The better your wiring, the better the signal (and less resistance == less noise). Also, with DSL, it MUST have good copper wiring not just in your house/office/etc., but also the entire route to the CO. Any step in the way with a shoddy wiring job, old copper wire, bad repeaters, etc., can cause DSL to suffer something awful.
Now, cable has it's issues too, most of which I mentioned previously. Just be sure then if you go with cable, then when they do the installation, they make sure that the spitter is internet-service capable. My first installation of cable was horrible because they had a splitter in the outside box (the part that they cable company doesn't want you poking around in) was from 1993, when the service was first installed and well before cable did internet connectivity. Once they switched the splitter to one with a specific-for-internet split, my connectivity was rock solid until I moved 5 years later.
Happy internet service hunting!
-dj