I got the champ, and am currently stuck at the end of the PME quest line where it asks to research 2 PME tech. I am debating about aging up to PME sooner.If I were you I'd continue on the PME cMap to get the champ as well. But that's just my preference.
I'm not a fan of Raino, since they tend to leave out information or not tell you certain things, but most of it is accurate as far as I can tell.
You should get some AAVs (I think, not 100% sure. Once again, I haven't tested this so I can't verify it) from the cMap, and you'd want to negotiate the Sheik's provinces. You get more diamonds.