How I wish there was a Vim which, much like Emacs, worked with proportional fonts! Theoretically, gvim supports arbitrary fonts, but only fixed-width fonts look nice because each character still takes up the same screen space. The limitation is built into the editor. Vim supports block editing mode, which is of course impossible if columns don't line up exactly. Using a nice font like Microsoft's "Consola" certainly improves things, but its readability is still a far cry from a real proportional font (just imagine a web page or a book set in fixed-width type).