Hondata S300 is probably the best. I tried using S100 on my old GSR turbo, but it was a no-go. A few tuners around here couldn't tune the s100. Ask me why, I don't know.

Honestly dude, I'd get tuned on Neptune. You have many, many more tuning options when you convert to obd-1. Not many people can tune obd-0. If your going to convert, get the distributor connectors as well from ry-wire. It makes it look cleaner instead of having a hacked harness.