The "right" ECU for Nistune

hmmm. ignorance/noobness perhaps? don't o2 sensors make the car "run" better? i dunno. /if it aint broke, don't fix it?

get a proper wideband and wire it to feed nistune, and tune accordingly as well. so at that point, pick whatever ECU you want, as the o2 would be irrelevant!

Im looking at the Zeitronix package. I want the car to remain gauge less.

You don't absolutely need a separate gauge to install a wideband sensor. Get a Nistune-compatible sensor (there's a list on the Nistune website) and wire it to the Nistune ECU; use the tuning laptop to monitor AFR's.

I'd want the ability to see AFRs while driving though, without having to haul a laptop everywhere. IIRC, Zeitronix has a small plug in LCD that will let me see AFRs