Gen II's have improved compressor wheel/compressor housing vs. the Gen I's. They should flow more and spool faster than the Gen I's (in theory, other factors - the rest of your engine setup - come into play). The GTX2867R would be a good turbo for the 2.0. With the smaller .64 A/R I think you should hit the power levels you're going after. The Larger A/R will hit higher numbers, but be more top end. With these smaller engines, it's always a compromise, so it all comes down to the type of driving the car will see, and build the engine around that idea.
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