Welcome to the forum.
I have had tongs for years, and they are not the swivel type. Have had no problem dragging logs with them and no problem with twisting of logs. I think I like the idea of having better control of holding the log from twisting. Often I will throw a chain around a log as a 'backup' in case the tongs want to tear loose. Even then, don't get too much roll.
However, not meaning to negate your opinion that you want the swivel. I wouldn't just because the tongs are longer to accomadate the swivel, restricting the height to raise the logs.