I would like to do away with my HY-35 and get a turbo with an external wastegate and actuator. Would my best bet be to swap with an HX-35 if I can find a cheap one or simply upgrade to a different pitch replacement as far as the turbine goes. Or should I just simply buy a super 62 or something of that nature?

 

The HX would be a gain, but not a huge one. One of the smaller S300's would probably be nice. I think you can get them in the 57mm variety. I've got the SPS62 now, not sure how much I'd like it on a comp alone. Its great up top, but takes a bit to get going.