We've kicked that idea around because ribbons handle EQ so well. Ultimately a decent outboard EQ unit or a good EQ plug-in will do a better job of shaping your tone, while giving you more options. Always remember the value of good miking technique - many times a slight change in mic placement will give you the change in tone you are looking for. Take a cue from one of the master engineers of our time, Al Schmitt. We've noticed that on tracking dates, most of his EQ'ing is done by making small adjustments to mic positions.