Whats the best MC cartridge for my new VPI SCOUT?

I think the Dynavector line would be a very good place to start, look at your phono stage as this will also play a part in your decision. I used to have a Dynavector 10X5 and it is a great musical cart. if you need higher output, the 17D2MKII is also a nice cart. I did go from the 10X5 to a shelter 501 which I like a lot more but was very happy with the dyn. VPI also seems to like dynavector with their tables.

At the $800 (new) price point, I suggest you put the Shelter 501-II on your short list. It's a hell of a cartridge for the money. You could also consider the Grado Master (the one that sells for about $800).

I would not recommend a high compliance cartridge like a grado. The shelter works ok even though it is high compliant. you did not mention how much gain your phono amp has. Is it MM only? Cartridges I like (Lyra Dorian)detailed but not too much, Benz ACE or Glider nice midrange, Sumiko blackbird also detailed. Depending on model you may not need a step up (my recommendation).

I also suggest the Dynavector 17D2MKII. I'm using it with the Dynavector P75 and Scoutmaster with great results.

Get one of the ZYX carts!