My favourite category of bicycle is Monstercross. The basic concept is to take a cyclocross bike and stuff the largest tire you can onto it. Put on large volume knobby tires running at low pressure. Road bike speed with off road capabilities and loads of fun.
One of the most beautiful Monstercross bikes I've seen was a bike from Shamrock Cycles. It was their entry for the 2010 North American Handmade Bicycle Show.
Every once in a while I see a custom bike and I think to myself: "That's the way I would build them." That is the case with these Shamrock Cycles Monstercross bikes. Good luck at the show Tim and thanks for allowing me to post photos of your bikes.
Tim and many other Monstercross bikes can be seen here over at mtbr forums on what is one of the longest running threads there. Excellent quality photo coverage for past shows are from Urban Velo. Enjoy the handmade goodness!