Nordic track is a quite a well known brand in fitness equipment industry. Nordic track treadmills are have a good range and are popular among fitness enthusiasts. Treadmills are good for indoor cardio exercises but elliptical trainers are catching up to them in terms of good cardiovascular machines. You can read about elliptical Vs treadmills in a previous article.
Elliptical trainers can give you a good cardiovascular workout. Usually they acquire up about as much space as a treadmill and are a safer workout than treadmills. There is an added advantage of an elliptical workout that you can use your upper body along with your lower body movements which is good for an overall exercise.