I personally ran the Rev Hard kit on 10psi for over 2 years and over 37K miles. It was daily driven and hitting 10psi everytime I drove it. I ran the basemap off of KManager, and it never had an issues motor wise. The motor had good compression, and it still ran strong before I yanked it out at 90K miles. The only issues were replacing a couple of wastegate gaskets, 1 turbo gasket, oil drain line for a ss braided line, and that was pretty much it. The redline was set to 7600rpm on my stock K20A3 original motor. I had the Denso IK22 at 1st and then switched to NGK BRK7E-11 gapped at .025". I would go with the Rev Hard kit just in case you want to upgrad the turbo later on. Or get a manifold with a T3 flange and piece together your own setup.
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