Josh -try to see and handle any of these rifles done by Martini & Hagn if you can - pictures don't do them justice at all. I've had the pleasure of talking to Ralf Martini several times at the Calgary gunshow .This time I picked up " Custom Guns" from him. A friend owns at least three of these single shots that I have yet to shoot. I remember thinking when I handled the first rifle (a .270 single shot that was for another customer) that $ 25,000 US seemed quite a reasonable price for this work of art -the next thought through my mind was just what I would like ! I appreciate that I was allowed to handle these rifles at the show instead of just looking at them passing by. You will not be dissapointed. Talk to them and see what they have in ideas on caliber -I'm sure they have some ideas you might not have considered. I'm sure something exceptional can be done in a reasonable price range with a bit of thought.
Glenn