I know the 243 is more practical, but the long neck of the 6mm sure looks good. My 243 is stainless and the 6mm is blued. If I regretted ridding myself of the 6mm I could rebarrel the 243 later.
I have a Leica rangefinder now. My glass on the 6mm Remington and 243 are NF 2.5-10x42's. I am very happy with them. I have Zeiss, Leupold, and a few Weavers too. I have never owned a Schmidt and Bender or Swarovski, I could try them.
