I remember seeing that for sale when I was looking. It's been customized for taking groups of people duck hunting.
I've got a new 225 on my 2520 MV and find that to be plenty of power, but with all the extra superstructure and weight on that one you might want more. A single 150 doesn't make sense because it probably won't be enough to get up on plane efficiently. And if you're just planning to use the boat at displacement speeds you can probably go with a little 25 hp motor and save yourself a ton of gas.