Hi all, I was wondering what is a good set of headphones I could get to use with my M6? I'm presently using the set that came with my old ace 250,( which aren't very good). I suspect this may be the reason that I'm not hearing many deeper targets. I don't want to spend over a hundred dollars. Also I read somewhere that higher impedance headphones (+100ohms) were more sensitive to smaller targets. I know that there will be a lot of opinions, but keep in mind the price and I'm not really sure about the impedance. They also will need a volume control as the M6 doesn't have any..... Thanks