I have a pool similar in size and shape to yours. My pool dealer (authorized Dolphin Dealer) recommended the "Dolphin Interactive" for about $100 - $200 more than the Dynamic. Apparently it's a new model this year and it is recommended for larger (up to 50 feet), free form pools. I had never heard of the Interactive model until I saw it in their show room. A google search provided a few on-line sources.