To be honest, I wouldn't consider buying one unless it was well balanced, so the option above is the only option for me. I'll be rooting for you either way though of course.

TOHKBD for me was fun for a while but as I said before I didn't use it all the time because the keys were much too hard to press and didn't travel very far, and the balance was off.

Both of those things could be solved by having a thicker/heavier base. A nice slider hinge would be amazing too. Don't underestimate how much the feel and balance of the device will affect the user experience (and sales beyond the first batch).