As much as I want to see the khukuri (or machete or short sword or etc.), the Scrapper 7 is the obvious choice. They'll sell more of them than they could ever possibly make.
I don't think the size or model has mattered much to date...they've sold out of everything whether its small, medium or large! <img src="/ubbthreads/images/graemlins/grin.gif" alt="" />