If you didnt already have the 5D2, I'd say just get two pre-owned 5D, and mount your 50f1.4 on one, and a 28 f1.8 or 24 f1.4 on the other.
I hardly think that the older 5D can't produce what you need (based on your description of use).
On my part, I had a good copy of the 28 f1.8 on a 5D and I didn't have any problems producing photos that were needed by my editor at the time (and no, I wasn't photographing for a newspaper, so quality was still a requisite).
That and the 50 fulfilled my need for a small, fast, and light setup - like the old Leica Ms.
The 24L and 35L are superb lenses, no doubt. But they are also significantly bulkier and heavier. Not to mention more expensive.
Just my humble 2 cents.
Good luck!
I hardly think that the older 5D can't produce what you need (based on your description of use).
On my part, I had a good copy of the 28 f1.8 on a 5D and I didn't have any problems producing photos that were needed by my editor at the time (and no, I wasn't photographing for a newspaper, so quality was still a requisite).
That and the 50 fulfilled my need for a small, fast, and light setup - like the old Leica Ms.
The 24L and 35L are superb lenses, no doubt. But they are also significantly bulkier and heavier. Not to mention more expensive.
Just my humble 2 cents.
Good luck!