Yea, I've tried a lot of different types of mice. The Logitech MX Vertical mouse has been the best for me so far. For split keyboard, I was using Microsoft Sculpt but after having my second one break, I decided to go up market to the ergodox ez. I think it's worth it but it is harder to get adjusted to.
I think a split keyboard will be my next investment, based on the comments in this thread.