I've been using SpellBinder and love the heck out of it.
I wrote a little mod which is now in SVN which applies your Spellbinder-set hotkeys to Bartender3 buttons. Bind a skill with SpellBinder, drop it onto a BT3 button, and the hotkey text automatically gets set.
I tend to prefer to do it this way, since I associate skills with keys, rather than buttons with keys. :)
It's in /files and SVN as Bartender3_AutoBindings, if you're interested. Same concept could be applied to other bar mods easily, but I just hacked it out for BT3 since that's what I use at the moment.
I like Bartender3_AutoBindings,
but it makes me accidentally press hotkeys when typing Chinese =(
There is no such issue when using BT3.