After the feedback on the previous design proposals I have picked the first design (A) and after a small redesign of it thanks to constructive criticism combined it with the two most popular texts. Here they are:
Initially these designs will be available on white t-shirts only, but other colours and even other items (coffee cups, anyone?) would be possible. I'm also thinking of providing a design featuring just the logo. Thoughts?
If there are no major complaints, I'll put these two designs and possibly the logo-only (which colour(s)?) version tomorrow online in the webstore, with the free-to-download designs (200 DPI PNGs) soon available as well.
Thanks for your help, you guys are awesome so far :)