I Am going to a costume party. My choices are (i) Spongebob, (ii) Darth Vader; or (iii) Condom Man.?

Which costume do you think I should choose and why? I think Spongebob would help me soak up the atmosphere, but it's probably too gay. The force will be with me as Darth, but I don't want to show my girlfriend my dark side. Condom Man could be good. First, it's cheap - just one box of saran wrap. But - I'm concerned that my costume won't let the real me out. I could come off as a real d--k head. Any suggestions?