I guess a lot will depend upon the SIB weight / outboard power and weight / crew location and weight, but I have found that the middle hole on my outboard gives me the best performance.
We (me and my Father in Law) spent an afternoon blasting around a lake trying different settings, and found that
- Trimmed further in than the middle hole the bow ploughed and the boat struggled to get up on the plane.
- Trimmed further out the bow headed for the sky and stayed there, despite my 12 stone sitting on the bow dodger!
I suspect you have a much better power to weight ratio than I do, so trimmed in may work better for you.
I can recommend a session playing with different settings as time well spent - ideally you want somewhere sheltered (to rule out effects of waves, tides and wind) and quiet (to rule out effects of being mown down by a Sunseeker whilst you are hanging over the transom trying desperately not to drop the trim stop pin)