Teri, I've had two Polaris models. A '95 SL750 (2 seater) and a currently a 2000 Virage (3 seater).
The two seater was tippy and hard riding, but you could do some awesome and scary things on it.
The Virage is a great general purpose machine. It has a 95hp 700cc 2 cylinder carb motor that has enough low end grunt to get a skier out of the whole with two riders aboard. Top speed with one aboard is about 50mph. The hull is great. Easy on the butt, but still very maneuvarable for a medium size jetski. Most people into Jetskis consider the Virage hulls the best compromise between cruising comfort and sporty performance.
If you need more HP, there are Virage TX (carb) and TXI (fuel injected) models that put out 135hp. Those will peel your face back at 60+ mph.
I really like Polaris quality, and I think the Virage is the best all around ski going for an average user. They can be had for around $4000 used in good condition.
Whatever you get, make sure you get it checked out by a local mechanic. Jetskis operate right on the bleeding edge at close to 7000rpm. One short ride without oil or a blocked cooling passage will cook a cylinder.