You have nice size for bodybuilding but you could probably go either way with it. You are a little off on your bodyfat, as that pic I would put you in the 11-13% range. At any rate I'm sure you could get shredded and look good in the light heavies. If it's your first show, physique is a great way to get a feel for the stage though you may have a little too much mass for physique. Guys built like bodybuilders don't win physique shows. It's really your call, as you could go either way