I have owned both the 33SA and the OC9iii.
The 33SA was a smidge better overall, but with pricing it should be. I think your arm is a tweener that work with either. My gut says that the OC9iii might be better with its higher compliance. I run the Art9 at the moment, but bang for buck in the AT line, is hard to best the OC9iii if you have the arm to match it.
I don't recommend the OC9ii, I don't think it is as balanced sounding as the iii. If you have a warm leaning system, maybe it would be a good choice then.
The 33SA was a smidge better overall, but with pricing it should be. I think your arm is a tweener that work with either. My gut says that the OC9iii might be better with its higher compliance. I run the Art9 at the moment, but bang for buck in the AT line, is hard to best the OC9iii if you have the arm to match it.
I don't recommend the OC9ii, I don't think it is as balanced sounding as the iii. If you have a warm leaning system, maybe it would be a good choice then.