Considering people outside of very major worldwide cities can’t just demo an expensive amp… how do you take the plunge? For example, I have some (basic, I know) HD6XX’s . To be honest, they don’t sound all that amazing powered by an iPhone, PC or Schitt Amp. Is it just sunken cost that gets people to buy more and more expensive amps and headphones until it either sounds better or you’re so deep that you can’t back out?