I've had great results with a wood bodied Benz MO.9 on my ARO which is on an LP12 as well. Coupled with the Artemis Labs PH-1, it provides excellent harmonics, with natural detail and dynamics that sounds like real live music, not hi-fi. I can't imagine why the Benz Ruby or LP wouldn't work well for you in the ARO. The Ruby 3H will be my next cartridge. I know alot of people have had success with the Dyna XV1S in the ARO, but I believe you may want to use the heavy counter weight with that cartridge or with the Koetsu's. You may want to try looking at the Naim Audio HiFI corner forum. A lot of great info regarding the ARO there as well as on the LP12. Please keep us posted as to what you choose and how you like it.