I have a BEHRINGER EUROLIVE B205D and TC Helicon VSM-200 VoiceSolo monitors which I use with my band and I can use them. In practice with the duo I am using a Yamaha mixer and the house mix and monitor mix are the same. It sounds really good to me on headphones. I have used wedges and I prefer the TC Helicon that I have. The difference with the duo is I am going to use my GR55 guitar synth and keyboards direct into the board so I won't have a guitar/keyboard amp. In ears are no more complicated to use. I just was wondering if anyone on the board has use them. Instruments sound great to me with the in ears the issue I was having is with the vocals. I can always use the monitors I have if it doesn't work out.