For an extra $100 you can get the Schwinn Airdyne. My wife and I have been using it for about 14 years along with elliptical trainers and ski machines. The Airdyne gives you an upper body workout and a lower body workout. I have burned well over 1000 calories an hour in my younger days on the Airdyne. They are virtually indestructible. If you watch pro football, you will see many of the teams have them on the sidelines to keep the players warm and loose.
Next to a good elliptical I don't think any piece of equipment equals the Airdyne.