I've got the HDPI. I've had zero problems. Great engine, but definitely likes oil! It's not as pricey as folks make it out to be. It's 30 bucks a gallon online and unless you are putting an insane number of hours on your boat, I wouldn't let it make a buying decision for me.
"Bragging may not bring happiness, but no man having caught a large fish goes home through an alley." -A.L.