Just wondering, but would printing something on the back of the t-shirt make them more expensive? Or was that even an option?
I think some these designs, especially the "R.I.F.R.M." ones look a bit cluttered as is. If the DC logo was moved to the back of the shirt, they'd look a bit sharper and easier to read. In my opinion, anyway.
And I don't mean to suggest that the shirts aren't cool as-is.