One key question is what source electronics. I recommended Focal because they are easy to drive. If they are multipurpose I assumed you would have different inputs. Headphones like Beyerdynamic and Sennheiser (I have both and love them, are hard to drive). Focal and Ultrasonde can be driven by many different sources. UltraSonde Edition can be driven by an iPhone, most cannot. Of course they sound better with better inputs and power. The application is critical to get the most out of them.