I would echo the suggestion to give it a try. That's what I did a couple of years ago and have loved having Netflix ever since. At first, I just hooked the Laptop to the TV and streamed it that way. Now I have 2 blu-ray players w/netflix, streaming on the wii and I watch it through media center on the pc ( needs live to stream ).
The highest I have been was 2 discs at a time when I first joined. We dropped back to 1 disc at a time (unlimited) because that was about all of the movie watching we could fit into a week. Now I do one disc and stream stuff now and then. Lately, I have been catching up on older shows of Top Gear and Battlestar Galactica.
But like others have said, you can try for a month free. Netflix customer service is very nice and won't argue if you change your mind.