Is it possible to make the ER6F 2011 model a bit taller? just a few cm? how and what to do?

What seat would be the best for it to make it more comfortable over longer trips as well? I know that the local somchai on the corner can make nice seats, but I dont like the leather they use there...

go to a proper seat shop ,he will/should have loads of leathers to choose from (they do in bkk)

gel is suppoosed to be best comfort you can get but ive never had a gel seat yet on any of my bikes yet