Nait 3R upgrade

Having recently bought a CDX, I now have a systema based on that with a Nait 3R and Royd Doublets and am wondering about my next steps.

I have been thinking 102, NAPsc and either 180 or even 250 but am toying with the idea of an 82 instead of the 102. Obviously the 82 is significantly more but is it really worth the extra? I am not really looking for a mild tweak.

Has anyone any experience of this upgrade path?

thanks, Jon.