This is very interesting. Can you play with the images a little more to call out the definition of the briefs? They look a little like rigatoni (please don't think I'm being flippant, I like the idea, but want the image to be a bit clearer). I'm not sure if that is a stronger outline to their form, a waistband or pin-striping or what, or a "RB" on the cuff of the short, but just a bit more detail so people know immediately what it is.
Also, can can you make the pages appear to have something on them? I don't know if that would work, but a blank piece of paper seems to be the wrong metaphor.
I like all the color options you are showing, but think the alternating slogan (black/color/black/color) works best for me. If i Had to rank the colors, from most favorite to least it would be 108, 107,106, 105.
Anyway, I like this, a serious, yet fun, interpretation of the business name. Keep playing with it and let's see where it goes.
Thanks for the creative work,
Leland