Robert M Watson Jr
Get the cheap one from cold steel and pay Keith Larman to put a durable handle on it. Should be $$ managable. Otherise you could spend $30,000 if you really want to ... you could spend $3000 if you want ...
What do you want? Your answer lays within your own question.
Want a shinken that'll stay intact during cutting, when that time comes, and not have the blade fly off and skewer anyone observing, as I've heard that can happen. Otherwise, want to save money, lively frugally.
I know when I buy I'll be consulting with my instructor, but for now, I'm curious.