I don't believe we are on the same page here. All of Sea-doo's RXT models, whether they be an X model or not, are supercharged. The RXP, the two seater, now has a 255hp option, a 215hp option and a naturally aspirated 155hp option. The supercharged models are faster out of the hole and have a higher top end speed. The only reason I can see to buy a naturally aspirated RXP would be to put a turbo on it!!! These are fairly large crafts, I personally would go with the RXT-X, if you have the cash/