Hello guys

So I'm new into woodworking and decided to go by the products Rob Cosman recommends when Sharpening. So I recently bought a 16K and 6K shapton.
However he recommend the Trend Diamond 300/1000 stone, but It got very mixed reviews... so I was thinking of going a DMT stone instead.
The DuoSharp 8", however this stone only got 365/600 in that size. To get 365/1200 you need to get a 10" stone.

Will It be enough with 600 and jump to the shapton 16K or do I need to spend the extra money on the 10"... rather not. It's costly at it is

Happy for any input.