I´ll make up my mind after talking to PCO. If I decide on a rebuild, they offer a warranty (and so does SSP which are a know company for doing Porsche rebuilds)
http://www.ssperformance.no/en/porsche.html
If I import a used engine, I don´t want to go through the hassle of removing the engine and send it back to use my warranty.. Then I´d probably get one from around here.