Because I don't want the clearance issue I would prefer the 9+27
Edit: used the calc and there is a 6mm difference between the 9.5 and the 9
So that means of the 9.5+27 is around 5mm difference to his setup
Then 9+27 will be about 11mm difference to his setup which will remove a bit of poke but still have a nice flush stance.
Will the fronts be flush with 9+27
Edit again: f**k I love this calculator finding so many good combos that are similar to his such as 9+20 only has a 4mm difference