I just purchased the DR 10 watt C-H10 Head w/Slimline Can, today. I was toying with the idea of buying the Halcyon, I already dive with their BC and back up lights and I think there great, but I just couldn't get my mind around the $900.+ price tag. I also spent time reading posts here regarding canister lights and DR seems to be well built, they have a very good reputation and great customer service. Incidentally, when I ordered the light I paid for expedited shipping, I live in Florida and DR Exp. is in Florida, they E mailed me explaining that it was unnecessary to pay the higher shipping rate as it would get to me just as fast if it was shipped ground and they deducted the additional shipping cost I paid. Nice. So I'm looking forward to getting it wet this weekend.
Nuff Said.