I have a Scubapro Mk17/G250/S555 set and two Apeks ATX200 sets that I use in the rotation. I also have a Scubapro Mk11/G250/S560 awaiting new hoses and servicing before I place into rotation. I'm leaning more Scubapro nowadays, and the Apeks sets will most likely get shelved.
I took the Titan down to the folks at my LDS, but they don't service Aqualung. They pointed me towards Scuba Gear Service in Tomball, Texas. I emailed for a quote for servicing the Titan including both R190s, and the reply came back totaling $245.
With the Mk11 coming into play, I'll sit on the Titan for now. It's definitely a nice flex option with all my extra parts in the bin.
If you were looking at taking or sending your reg set to Tomball for service, then give Chris at Dive Zone Scuba a call, (832) 444-5063, he is in Pearland.
-Z