I shoot a lot of the CCI sub-sonics (40 gr), have also tried the Aguila SSS 60 gr loads, and just started trying Remington sub-sonics (38 gr?). My only .22 (a model 60) gets great accuracy with the CCI's, however, out of the last box that I picked up, about one in five rounds made it to supersonic velocity. Maybe it was just a bad run.
I haven't had this experience with the Remingtons, but I haven't shot as many.
The heavy Aguila loads shoot pretty poorly from my model 60, and don't seem any quieter than the 38 and 40 gr loads.
Most importantly, the 40 gr CCI's kill starlings right dead within 100 yds, with minimal hold-over.
Freakin' Shakespeare.
Oh yeah - volume. I wouldn't feel that any of these would be pleasant (or particularly wise) to fire indoors. They're definitely quieter than a supersonic load, but still have enough punch to ricochette, and the only noise difference I really notice is the lack of the supersonic crack.