Another vote for the M4 with a GPS module. The M4-2t will get you two temp sensors and that’s probably all you’ll ever need. Or a basic M4 and add an expansion box in the future for three extra temp sensor ports.
Here’s a link to AIM videos. Ignore the Race Studio 3 stuff. https://www.youtube.com/user/aimdata
LAD Specialties customer / tony kart / rotax / kt100