If you really do appreciate something good and special that not anyone has, so go for 8mmS/'323. My recommendation in this case will be the superb 8x68S, a well known European Mag. without meaningless belt and strong performance.
Thought I would be the first one to suggest the 8x68s. I have owned one in Sauer 202TD and shot it in a Blaser R8 several times. I actually have a Rem 700 in 7mm RM that probably will get another barrel in the near future in 8x68s.