Hi Rockinroni.
Yes, I use a Shelter 501 right now, and it's very nice.
I have not owned an AT OC-9 personally, but have heard them many times. They are quite a nice cartridge, and have been sort of a cult item for years. Not in the league of the Shelter, but better than alot of cartridges in its price range. I'd have to say that on my arm, I prefer a Denon DL103R in the lower price ranges, but that's a personal preference, and some may like the OC-9 better.
Yes, I use a Shelter 501 right now, and it's very nice.
I have not owned an AT OC-9 personally, but have heard them many times. They are quite a nice cartridge, and have been sort of a cult item for years. Not in the league of the Shelter, but better than alot of cartridges in its price range. I'd have to say that on my arm, I prefer a Denon DL103R in the lower price ranges, but that's a personal preference, and some may like the OC-9 better.