I bought the pen only version, thought the touch was over priced. Im really interested in utilizing the buttons and on the Intuos 5 (im not sure about the 4) the touch wheel can have three modes set to it, so you could use it to scrub your timeline, step frame by frame on your time line, zoom in and out ECT the I think you have 8 buttons so a quick guess at some useful tools could be applied,
1. Set in
2. Set out
3. Insert
4, Over write,
5, Delete,
6, Trim
7, Slip
8, Mute Clip