There is no design that will please everyone, so go with one that pleases 90%.
I don't mind it with flippers or without; the flippers are a nice touch and make it more obviously pinball related, but they tend to crowd the design a bit. I think the URL looks better in lower case (which allows www to fit at the front of the URL). I also think it is good to have the URL on the front of the shirt as well as the back.
Don't like the white url, red and white version looks heaps better.
So my vote goes to the bottom one of the two presented in reply #124 in this thread (final two) but with the url in lower case and with www out the front.
