Unlikely to be out of round seeing as compression and leakdown were perfect on the other 3 cylinders and honestly cylinder 4 walls look more pristine than some of the others. This is why i'm taking it to the shop though - to be certain we have good hardware before rebuilding - its just not worth all that time and expense without knowing you have good underpinnings. I really don't want to do it again!
I run my Cobb APv3 on the dash at all times. We have tons of logs and I run active display of Boost, AFR, Knock, Timing, etc. Its one of those pay to play kind of things. As most of us Subaru nuts with modified cars would say "Its not if your going to break something but rather WHEN!". At least the next owner will have one less thing to worry about for awhile (assuming it gets sold modified).