Your comments

I think this is really a requirement for an efficient coding workflow - in other editors, I have 1 large editor on the left, with 2 (or more) split vertical editors above each other - having this in Sublime would be brilliant.
I'd also like this, but not for Japanese characters - I keep my Sublime profile in Git, and sync between my Windows boxes (work) and my Linux boxes (home) and they don't have the same fonts (Consolas isn't on Linux, and Consolata isn't quite as nice...)

If you could provide an array of suitable fonts, or a tuple, or whatever (similar to how css tries each font successively until it finds one that works) that would be extremely awesome.
I have exactly the same issue on Windows. Was just writing a forum post about it...