I have an almost identical setup as that described in this post. Being in the terminal and integrating with tmux is a wonderful environment - lightweight and immersive. And all these Vim plugins are of such good quality - are Vim plugin authors perhaps of a different, geekier, ilk? So it's a shame that vanilla Vim is restricted to its special modal editing paradigm, there's so much more to it than that.
BTW I post this on HN everytime I see a gushing Vim thread, apologies if you've seen it before.
PS I'm also working on refactoring my tmux keybindings that do a similar thing - SHIFT+ARROW to select, CTRL+C to copy, CTRL+D to select the current word, etc, etc.