Well the motors in all of the current SeaDoos are 4 strokes that are 100% different from the 2 stroke you had in your '96. Very reliable in comparison, and able to put out some serious HP numbers.
If you are financing, you might be able to find some old stock ('08-09) RXT for killer prices near your target range. That'd be a great 3 seater with a ton of power. Give a couple local dealers a call and see what can be done. Riva is selling RXP-X's from '09 for under $10k, so it is definitely possible.