I might have to keep an eye out for one of those Tipros. I don't think I would ever be able to justify the price of a new one though.
I'm still rearranging keys, but the main ideas behind the layout I'm working on is to avoid carpal tunnel syndrome and have key groupings that are more logical to my brain. I spent a few days with Dvorak, and while I liked a few aspects of it, a good bit of it made no sense to me. I switched to Colemak after that, which I like and am typing this response with, but i feel like its similarities to QWERTY actually make learning and switching between the two layouts more difficult for me. I want an optimized layout that makes no concessions to QWERTY, and this is where I am at with that right now. Still need to account for bigrams (common letter sequences) and I might like W to be more accessible.