I am not sure you are going to gain a lot outside of an improved ride by moving up one foot to the Bayliner, even though it is a nice boat. The 20-21 Bayliner outboard will give you more room. Having had a 22 Sylvan aluminum for eight seasons, it may also be a good option for you-the Islander is similar. I towed the Sylvan with a s-10, so a modest tow vehicle like a small pickup, mini-van or suv could handle it.