The pipe cutter is one of the best and least expensive ways to consistently get good clean bar cuts. It even works on heat treated bars, though it is VERY tough on the pipe cutters blade, so I recommend buying an extra blade or two for the cutter before you begin.
Also, measure twice, cut once, and if you aren't 100% positive how short to make your bars, take off less, then take off more later. You can NEVER put it back on again, and I have learned that myself the hard way.
It takes about 5 minutes to actually cut your bars, but spend an hour doing everything right and you will be a lot happier.