awap - Great question. I'm not replacing the Scubapro, I'm replacing my wife's regulator. Her reg was several years newer than mine, but the service kits are not available for it anymore. It was "retired".
I recently switched to an Atomic SS1 as an octo/inflator, so I thought it might be cleaner to go with a B2 regulator and pass the Scubapro to my wife.
The Scubapro still works GREAT and has never given me the slightest problem. However, I'm willing to consider Atomic because the guys who started Atomic were the ones who designed my Mk10/G250.
---------- Post added March 16th, 2015 at 05:15 PM ----------
I also noted that Atomic responded to my post in less than 90 minutes - that's a good sign!