So.. I still think the HOG's are great regs, but I had a series of issues with my regs related to the lack of dealers in Australia at the time and the apparent inability of anyone locally to service them properly. I had them serviced 3 times in rapid fashion by different shops after I broke them on holidays (where I couldn't get them serviced due to lack of parts) as they were never the same as they were when new. I then had a colleague service them for me to get them working as all 3 shop services left them in poor state. We discovered that the 1st stage had been assembled wrong and I had a damaged knife-edge, but by this time i'd spent enough to have thrown them out and bought new.
As all my fellow divers, instructors etc all dive Apeks, I had to make a decision and decided that the availability of parts, the trained service techs, and the ability to parts swap with friends over-ruled any cost saving by going HOG. This is not HOG's fault, in the US this decision may not have been valid. But after sinking nearly $20k into my dive gear, the couple of hundred saved wasn't worth missing another dive over. Again, nothing wrong with HOG, just not practical in this country currently.