I think im going to call this because if you fold the stacks are now:

5390
1640
1610 (you)
1360 (him)

If you call and lose the stacks are:

5390
1920 (him)
1640
1050 (you)

Even when you fold SB is back in the hunt, the only difference is that he has you covered if you lose.

I havent even touched on what the stacks would be if you win. I call the bet, and hope im not dominated.