What fuel fmu to use?

I am looking for some type of engine management system because ive been looking at like diablo chips and sct chips but there all expensive and somewhat perminent or a pain to reflash. I was looking through nopi’s e-cat and there are a lot of really affordable fmu’s from hks and greddy, I was just wondering if anyone uses them here and what they use and what everyones heard. Thanks

the apexi afc is really good