iI had a 306 and I was very happy with the boat. Selling the boat was a big mistake. She would go where my 330 or 336 go with no problems what so ever. From 25 to 30 is NOT a big jump, go for the 306. Mine was a 2006 with F250's and i was getting 1.3 to 1.5 at cruise of 28 to 32 mph.