I love both MB and TZ. The main reason I bought MB is because the opportunity popped up locally. There were 3.3k MB made and 14k TZ. And I've seen TZ pop up for sale more often than MB.
I would pick up MB if you have the opportunity. You should be able to sell it quickly and find a TZ if you don't like MB, or get tired of it.
I have not shopped a TZ but I think it would be more difficult than shopping MB. MB has been rock solid for me except a minor popper issue.
I am searching for a TZ as well, but I can say if tragedy struck and I had to sell pins, MB would be the very last one to leave. It's just fun, not too deep but not too light either. Fun!