I have had zero issues with rust/odor transferance on the CN. In my experiance the edge on the CN last longer than on the FKM.
Regarding stones, why not stop at the Rika 5k? I am not any sort of award winning chef, but on my work knives I use a 1200, the rika 5k, then strop on CO loaded balsa. Really no need to go to 10k.
At home on the other hand, taking it to the high grit stones is just plain fun.