We have a treadmill that we bought at Dick's Sporting Goods. Can't say I do much on it but walk on it to try to help out my knee and sweat a little, but my wife runs on it almost daily. She loves the damn thing. We chose the one that was one step below 'top of the line'. It is intended for users up to 350 lbs and it handles my height and weight no problem. It came with a 12 month warranty on everything and we bought the lifetime warranty for around $160 I believe. Would be well worth the money if anything happens to it like our elliptical (well over 6 visits by the tech to get that working, a whole other story). All-and-all I think it cost a little over $1200 for everything and if you used it fairly recently for two or so years it would be well worth it. I know my wife has gotten the money back out of the elliptical already.
I believe this is the model we have:
http://www.dickssportinggoods.com/pr...367438.2367453
And they go one sale about every other month for $999-1099 and we got a free "workout TV" delivered with ours. Oh and unless you are using it on the same level as the door it is coming through, I would recomend inside delivery