Those are the two most stable ROMs for our phones. CAI was made for the Optimus S by theKraven, and has a patch to run on the V. You can find it over on the Optimus S forum.
There is a plentiful second tier of pretty good ROMs. I would include theKraven's PAC ROM (a really good attempt to get JB running on our phones). I'd still be on it if I didn't need bluetooth. Any of the GB roms for our phone are pretty stable, but not as optimized as MiRaGe. I like Gingersnap, Harmonia, Om-mandylion, Jellybread, and BobZhome's ROMs.
It only takes 30 min or so to flash a ROM and set it up like you like it, so I would try a bunch if I were you.