Using tmux with both emacs and vim

What is the best default key binding for tmux and why if one sometimes uses emacs and sometimes uses vim (on Linux Mint 12)? Ctrl-b is OK, but that conflicts a bit with the bash shell and emacs.

I found a good answer in a related post: What's the least conflicting prefix/escape sequence for screen or tmux?

And I've gone with Ctrl-\. Below is my ~/.tmux-conf:

set-window-option -g mode-keys vi
set-window-option -g window-status-current-bg blue
set-window-option -g automatic-rename on
set-option -g status-keys vi
set-option -g history-limit 100000
set-option -g base-index 1
set-option -s escape-time 0
setw -g mode-mouse on
set-option -g mouse-select-pane on

# We won't worry about sending C-\ to any programs
# bind-key C-\ send-prefix

# hit C-\ twice to go to last window
bind-key C-\ last-window
bind-key b set-option status

bind-key / command-prompt "split-window 'exec man %%'"
# vim's definition of a horizontal/vertical split is reversed from tmux's
bind s split-window -v
bind v split-window -h

# move around panes with hjkl, as one would in vim after pressing ctrl-w
bind h select-pane -L
bind j select-pane -D
bind k select-pane -U
bind l select-pane -R

# resize panes like vim
bind < resize-pane -L 10
bind > resize-pane -R 10
bind - resize-pane -D 10
bind + resize-pane -U 10

# C-b is not acceptable, due to emacs, bash, and vim
unbind-key C-b
set-option -g prefix C-\

I strongly prefer C-], which doesn't conflict with vi bindings, and conflicts with the default abort-recursive-edit binding in Emacs. I use that rarely enough, and in nasty enough circumstances, that typing it twice isn't a big drama.