I never really understood the need for a quick reply box. I mean, sure they can speed things up, but whenever I use one I am compelled to make a much shorter post for whatever reason...
That and the fact that you can't preview your post. (A godsend if you're using compicated tables... ugh)
However, I wouldn't be opposed to the addition of the boxes if I could turn them off.
(Perhaps a javascript pop-up?)