Last Minute Halloween Costume Decision

Ok, so Halloween is fast approaching and I am stuck between two really cool ideas for my costume. Originally I was going to be the Stay-Puff Marshmallow Man from Ghostbusters, but that idea was dashed after I realized how hard it would be to assemble the costume this late in the game. So now I'm stuck between two awesome ideas for a costume: Dexter Morgan the Serial Killer or Doug Funny as Quailman.

With the Dexter costume, I would be wearing his thermal shirt with some blood splatter, leather gloves, cargo pants, and boots. Possible accessories: fake knife, black trash bag with body parts, police badge laminate, amputated foot, fake syringe.

With the Qailman costume, I would have the belt, towel cape, converses, and shorts with underwear overtop.

So I would love to hear your input as to which to go with.