We have had cable for about 4 years now and have had Zone alarm installed almost from the very beginnning. I love the speed of cable, but last month we received a notice from Comcast (they bought out AT&T) that our rates would be increasing by $15 per month!!!! My dh and I are so angry with them right now we are ready to cancel.
Comcast did include a notice stating that we could lower our rates if we signed up for their television cable service. We have a satellite dish and have no desire to switch that to cable. At this point we're not sure if we are actually going to cancel, although the liklihood is very good.
Anyway, I'm positive you'll love your cable speed; I just hope the prices don't get you down.