graphics look good, just a piece of advice about t-shirt making, don't skimp on the quality of the shirt. go with something like american apparel instead of the default brand whereever you are getting it made, the difference of a few bucks per shirt is so minor when compared against the quality difference, you won't be disappointed.
If you don't already have a place to get these made or if they don't give you enough options, I can point to the place i've used in the past.
tony