Main reg Apeks ATX200 with egress octi, and a cobra 2, backup is an Aqualung Legend LX ACD with Titan octi and a cobra 1.
My wife is using a Mares V16 with proton second stage/octi and Apollo gauges/Nano computer. Her backup is a set of Aqualung Titans.
No complaints with any of the regs.The protons are great for reducing jaw fatgiue - light and small. Used to be my main set before I upgraded.
Only regs I've actually hated using are the cheap Atlantis regs that get sold with budget dive gear packages. Ended up sucking in more water than air once I got past 10m.