I have my rule, or as someone else called it my collecting algorithm. And for the time being I'm gonna stick with it.
If I'd be more solvent - who knows, maybe some day... - I'd be collecting Para 3s, PM2s, and Millis. I just love the straight spine blade and the action of these masterpiece designs. Plus N5s, though not the lightweight versions. I think these 4 inhouse designs are the best there are.
I'd still be buying collaboration models.
Some of those are among my ATFs.