We bought a low end Dixie Chopper 48" mower zero-turn mower this spring and are very please with it. It has plenty of power and does a nice job cutting. No suspension and is a bit bouncy on the rough ground we call a lawn at the farm. It is really great for mowing around trees and bushes. It shoulb be noted that steering can be a bit of a challenge , particularly around the edges of sloped areas with the requisite gopher holes etc.
You will find that you have to actively steer at all times where as with a riding lawnmower, you can use a knee to lock the sterring wheel on long straight runs.
If you are sensitive to vibration in your hands (like with carpal tunnel or tennis elbow issues) you may find it hard to use for long periods. My other half has tennis elbow issues and can only mow with it for short periods becasue of the vibration.