BMS 4.33U2 is the most current and most complete version to date and the only one to my knowledge that is still supported.
For single player (and MP if you can find someone), you can still fly F4AF as it is stable and the Campaigns work. Balkans and Korean theaters are the only campaign options AFAIK. SuperPak was a patch IIRC. Skunkworks was a Mod available for F4AF and is almost impossible to find but can still be found I think...
http://simhq.com/forum/ubbthreads.php/topics/4283304/F4:AF_any_patch_sites_still_up#Post4283304 OTOH, BMS is just better with much more realism, reading/studying, theaters, weapons etc. etc. etc. I would fill up the rest of the page with the pro's to picking BMS over AF, but that is only if your dead serious about realism. Probably the biggest difference is the fully clickable 3D pit that you get in BMS. Honestly, if this was available in AF, I might be inclined to pick it up and play it every now and then.
The rest of the versions you mention are pretty much dead now.
HTH