Can you recommend a web-site for printing a high-quality custom t-shirt?

I’m looking to have a custom t-shirt printed as a gift for a friend and was wondering if anyone could recommend a site with high-quality printing at a reasonable price. I’ve tried Cafe Press in the past and was disappointed with the quality. A site that takes environmental issues into consideration would also be a plus (i.e. organic shirts).

If you just want to post about the sites that you’ve tried and what your experience was like, that would be helpful as well.

Thanks in advance!