We just switched over from a cable modem to DSL today. One of the perks that the local phone company threw in was a DSL modem that worked both on Ethernet (so we could hook up both my dad's computer and mine) and as a wireless modem. In addition, they threw in a WiFi modem card for my laptop.
So far, I've not seen any difference between DSL and cable. I'm writing this from my laptop. It's not quite "wireless" since my battery's acting funny and I have to have the laptop plugged in to work. It might be that I haven't used the laptop in over a month and the battery needs a long recharge.
The advantage of having a third Web-ready computer is that Eileen and I can be on-line at the same time, or Eileen can be using the desktop for word processing while I go online. Also, the couch is comfier than the chair I got at the computer desk.