xperks - its a great boat - I have a 257 advance, which is almost identical except for the hull running completely back to the edge of the transom - if memory serves me right, the 247 advance's hull stops a few feet before the end of the transom...to me, your power question is more a function of intended use - if you plan to stay in the bay and make it a "cruising" style boat then I think you're fine - if you plan to take it off-shore or have it heavily loaded, I would suggest greater power - I run Twin 150 Yamaha 4 Strokes and LOVE it - I am an avid fisher and make long runs off-shore and have both the reliability, redundancy and fuel efficiency that I need - if I were a "bay" boater, and hole-shot as well as top end speed are not a big concern, then I'm sure you'll enjoy the boat and have an amazing time with it - I would definitely sea trial it the way you intend to use it (e.g., when I sea trialed mine, I got 5 200lb guys to come on board with me to simulate the 2-3 people plus ice and gear that I'd be running off-shore with)
Good luck!!
JC