I think I commented on the other one. Both of them are great! I think I prefer the white one just because the white bg of the image flows better with the white shirt - on the black one, DA would have to print white on the black shirt, as a primer, just so that they could print the colors of your design over it. Depending on how they print, it might cost more to produce, so I recommend the white one. This is funny, creative, and just rad in general! Please offer feedback on my design – and vote if you like it! - at [link] - thanks!
Interesting, and amusing, idea. Though I'm not too sure about how you have the front. In my opinion, I think it'd look better with the image horizontal across the chest rather than being vertical cover all of the front. It'll be smaller, but I think it'd look better.