Exercise Bike vs Elliptical

ekking69

I have knee problems. Have forever. They were built wrong and I will always have them, according to my FIRST orthopedic.

So I've finally decided to sell my treadmill (since I barely use it) and replace it with either a stationary bike or an elliptical machine, since both are low impact for knees.

I desperately need help choosing an affordable home machine. I need one that will hold a decent weight to start, that feels sturdy and doesn't rock like crazy while being used. It needs to have bells and whistles, like stride adjustment, tension, calories burned, etc.

Do you have one at home? What do you use and would you recommend it? Help!