Vote, if you want to learn its operation "Realistic to the switch..."
As realistic as possible!...And how much reflex would it take to operate the Shilka? Given its nature as a SPAAG...
I have to vote for the SA-2F. I default to the Volhov the few times I've managed to play. I'm used to LORO mode radar and I miss it when I'm using the S-125.
As far as I can tell, LORO mode is currently only useful maximizing detection range, decluttering the scope, and possibly improving guidance accuracy in the sim. It should help against off-angle standoff jamming, which is probably yet to be implemented, and SA-2F doesn't have the antenna for that...Well, perhaps.
Too bad we can't substitute S-200 for S-75 in those scenarios.