Best choice for Koetsu R.Sign. and Benz LP

Hi guys. Now I have an SME 309. I´m looking for a best marriage between my carts (Koetsu Red Signature) and Benz LP. Both sounds lovely with 309 but I think they sound better (more effective mass, of course). What´s your opinion? Some arms on my mind:

SME V
Graham Phamtom B-44 and Supreme
Some Clearaudio´s arm like the new Magnify

Thanks in advance for your experiences.