M really torn between which one of these to purchase. I like both but wonder which one would give me the best bang for the buck.

The elliptical is a good machine, but think twice if you have knee problems. It seemed to revisit my problems more than often when I had my gym membership. About 3 years ago, I had to choose the NordicTrack T8.0 treadmill and sometimes my poor knees still hurt like mad! The treadmill has offered me more control I must say. I use it 6 times a week, 45 to 60 minutes, with the Ipad connected. So far, no mechanical issues with it. Good Luck with your decision.

M really torn between which one of these to purchase. I like both but wonder which one would give me the best bang for the buck.

I was in the Army for 8 years and first tried the elliptical in physical therapy for my knee injury. Even after I was well, I was addicted to the elliptical. In my experience you burn roughly twice as many calories as the treadmill and its not going to kill your joints.