Help/Guide Feedback on Finishing Stones (10000 plus)

It has been a while since my last post so take it easy on me



<Background> I currently use both the Waterstone & Scary Sharp method and have done so for a few years



My Waterstones (King) include

220

800

1000 (Combo Stone non King)

1200

3000 (Combo Stone noin King - not impressed :()

6000

10000 (Guess as it was a natural Jap Stone but not impressed with the finish - could be a normal Stone not for sharpening :~)

Finish on a Leather Strop with green Compound (Just a few stokes)



The items (Chisels & Plane blades) I sharpen include the following steels

PMV11

A2

01

Japanese White Steel

Old Swedish Steel



I have recently purchased the Trend 8" Diamond Stone (Combo with 300) which will replace my 1200 and lower stones (Good bye mess and continous flattening :U)

I also have a king 4000 being delivered as my next stage in the porcess (To big a jump from the 1000 Diamond to the 6000 King)



My Question is, are the Sigma Power Select II stones worth it, at the 10,000 or 13000 grit level before going to the strop :?



Any feedback or suggestions would be appreciated