I've already made the switch to MacVim using Janus - https://github.com/carlhuda/janus but Vico could be interesting. The biggest win here, like with Sublime Text 2, is being able to split the window into panes, which is something I've wanted in TextMate for years. However, what I really want is to be able to open a different file in the other panes, not the same file I have open.

[edit] Okay just figured out how to open different files in split panes. It's a little non-intuitive (you have to select the pane and the use the Open Files drop down, and have that file open in another tab (?!)). Would be nice to be able to select that pane and then just click the file I want in there in the Explorer.

Would really like to have some integration with Git. I don't see the Git .tmbundle available in the list.

It would be nice to be able to bring over a lot of the features of Vim, or maybe you can and I don't see it.

Looks like it's scriptable with Nu - http://programming.nu/index - which I haven't heard of.

The symbol list on the right is also great, makes jumping to methods a breeze with nice animated highlighting. I'm really starting to dig this.