For a basic camera, for fun? M9 or MP (hard to tell because of 40+ years history, but probably, being honest, and today, M9). Lenses: 35+75, others as necessary.
Forty years of using Leicas has persuaded me that there's nothing I like better. This is just as well, as I have 5 M-series bodies and well over a dozen lenses (shared with my wife, who has a ZI and a couple of Bessas of her own).
I feel sorry for people who don't know what cameras they like and can use, because it gets in the way of taking pictures, which for me is what photography is about. I know: I've been there.
This is not to say that Leicas are perfect for everyone, or for all purposes. If I shot sports professionally, I'd buy a DSLR (one of the better Nikons). For most advertising, I'd probably buy/hire a Hasseblad or S2, or possibly an Alpa. For still life (= many kinds of advertising), maybe a scanning back on a Technikardan. And so forth.
Cheers,
R.