I went through the same decision process about a year ago and went with a pair of C370's and a Mark 11. I'm anal about traveling light and while the Apeks Flight and Aqualung Mikron were top contenders, the C370's are incredibly light and the MK11 isn't too bad weight-wise. Plus all 3 components are physically quite compact. And the price was reasonable. Finally, compared to the Mikron and Apeks, my LDS prefers to service Scubapro and that factored into my decision as well.
The setup is perfect for me. When I recreational dive in warm water, I can get all my gear into my roll-aboard and backpack and don't have to check anything (except when traveling the last leg on the prop jobs).
Since March, I've done about 100 dives with the regs. and they've performed just fine. Since I only dive warm water, I'm also able to use them for technical diving. For that diving, I move the C370's over to my (DIN) HOG D3's. I've had them down well past 150' on the San Francisco Maru in Truk and at the Cavern in Grand Turk and didn't notice and WOB issues-- they breathed just fine for me.
Just a thought. If you're an instructor/divemaster and up & down the ladder or flipping onto a RIB constantly or diving on boats where equipment gets trashed & bashed continuously, lightweight regs. won't hold up as well as a traditional brass regulator. But if you're doing a hundred dives a year and keep things clipped off and take reasonable care of your equipment, they should be fine.