Tough one this month. Like Wes, I'd probably be inclined to play RAD's myself. Although push/pull selectors drive me up the wall (Are you listening, Caparison? ) I'm a big fan of yours, RAD, but the colour scheme on this one doesn't do it for me like your others.
My vote is sitting on the fence between hooglebug and Hitone. Both really nicely made and really unique fiddles. But I think Hitones pin striping has won me over.
And the fact that it was built for charity, top stuff bud. I don't think it will have any trouble standing out from the other artwork