For the last 3-4 years, Costco has been selling a 10'10" PVC HydroSport inflatable rated for 15HP for around $500. They seem to go on sale in the stores in the spring.
I bought one a couple years ago and it's been stellar. Fortunately I'm able to store it in my covered slip on a dink float so it stays out of the water and the sun when not in use at my home slip...the Achilles heels of PVC dinks.
__________________ My boat is my ark. It's my mobile treehouse and my floating fishing cabin. It's my retreat and my respite. Everyday I thank God I have a boat! -Al