The Capcom Fighting Collection and the standalone collection releases are valid to run here. They use a variant of Final Burn Alpha or FB Neo for emulation which has always been allowed.
Just note we may eventually retime or separate all of the runs to normalize the board as those versions do run a bit faster than Arcade/MiSTer. It hasn't really mattered in any of the runs yet though.
I can add it this weekend. Feel free to use Arcade if you submit beforehand and I'll just update for you though, no worries.
Turbo 2 is a happy medium. Fast enough to be competitive on the board and get a feel for mechanics at a higher speed, but not so uneven as to mess with learning execution. DS1 has some uneven frame rate when set to T3 that's made slightly worse on the Collection and FB Neo.
Nothing terrible, but it can feel like you're randomly dropping inputs on Turbo 3 even on real hardware.