Why for? Unless you're going to get heavily into tuning the thing, there's nothing wrong with the RENIX setup (of course, I've got a bit of a rep with RENIX anyhow - having had five RENIX rigs to date...)
However, I do prefer it to just about any OBD-I/OBD-II vehicle I've had or worked on to date. No codes, you do yer own thinkin', and the whole system can be troubleshot with an analogue multimeter (you can do most of it with a DMM, but there are a couple of tests where you do have to have an analogue.)
I'm not trying to shoot down your idea, just trying to understand.
(In a technical sense, RENIX is "stupid". That's what makes it so easy to work on...)_