Re: best kind of boat?
Not nearly enough info provided to make any intelligent comment.
For the record, 'I/O' and 'sterndrive' are merely different terms for the same kind of drivetrain. It's an inboard engine with outboard-like drive. Now...
1. Where do you boat? Area of the country and type of water (lake, river, bay, ocean)?
2. How many passengers will you normally carry, and how old are they?
3. How will you use the boat? Fishing, cruising, overnights/weekends, tubing/skiiing?
4. What's your budget?
5. Do you expect to trailer the boat? What do you tow with?
An outboard can be good or bad depending on brand, model and how it's been maintained. Ditto for the sterndrive (I/O). The other choice (depending on the size of the boat) is an inboard, either direct drive or v-drive... and the same caveats apply.
My .02