We purchased two shirts: a cotton map shirt from ClassB, and a technical shirt from Cyberhorse. The map shirt was to wear around town and at school, and the tech shirt was for the trail.
The tech shirts are awesome quality...very soft and lightweight, but very durable. They use sublimation printing, which will never come off or fade.
Most of our crew wore the tech shirts for the duration of our trek. I created them using photos of the Tooth and Baldy, from a Philmont ranger. We've got a shot of some of our crew on Baldy, on the Cyberhorse website http://www.chsportswear.com/bsa/bsa-champs-photo-gallery/ . We're #24, at the end. Our shirts have the Tooth on front and Baldy on the back. We also put the Philmont bull image over the shoulder, and put our crew info on the sleeves.
For those of you heading to Philmont this year, the shirt is posted in the dining hall.
I highly recommend Cyberhorse. If you order from them, tell Cindy that Liz says hi :-)