You're a treasure trove of info, thanks man.
I've decided to learn MSA/read Arabic via Pimsleur and use Peace Corps materials plus this text to work on Darija later on.
Much appreciate the offer of help :)
I've decided to first learn Fus7a/MSA, as I have pimsleur tapes for these languages and need to know it to read regardless and can use it in other Arab countries, like Mauritania, which I will also be passing through.
Then later I will study some Darija, here is a book I have bought: