Thread: treadmill vs ellipticle??

I consider myself a runner. I run 4 to 5 miles daily, whether it be interval training or long runs. I have completed 2 half marathons. I have always advised my friends not to get cardio equipment for their house. I have seen it just sit there unused, be used as a climbing toys by children, or it just collected dust. Besides, there is a certain element to your work out when you are in a gym environment that you can't get at home.

However, I am now considering getting a treadmill. I have a 5 yr old and I have just started a job that is a little more demanding. I have a couple of questions. I am considering buying a gently used treadmill or a cheap treadmill. All I really care about is speed and time. I don't need all of the extras. So here are my questions:

1) Is the difference between expensive treadmills and cheap ones, just the amount of things that you are able to do with it, such as count calories, incline, etc.... Or does it make a difference as to how it is for your knees, etc?

2) Does anyone have a brand they recommend or a good store where you can get a good deal?

Krissy