What kind of cardio machine should I get??

eggplantpants

I'm wanting to invest in a piece of cardio equipment for when I don't want to do circuit training. I was thinking either a bike or an elliptical...not so much into the treadmill. Mostly what's important is low impact and doesn't take up too much space. I was eyeing a few compact ellipticals the last time i was at Wal-Mart and I've seen some foldable stationary bikes on Amazon.

What are some recommendations or things I should consider before making the purchase?