I never use bar chords at all. I dont think they sound too good with distortion, plus thats that 5ths are for. N I see them as an easy way of playing eg. Fly Away by Lenny Kravits. I know power chords are the same but I tend to put leads over 5ths. N they arent the easiest of chords. Although I'm sure some of you are gunna completely say something to contradict that.