I'm looking for a pair of SDC for OHs and acoustic guitars. I was set on the C4s but i've been reading so much good stuff lately on the HM-1. What are the differences and which one would be better for the applications I mentionned. I would save a pretty good amount of money with the HM-1s because I live in Canada. I could get them shipped for 198$. The C4s would cost 319$ plus S&H. Someone please help!!! Thanks!