I think most amigas are pretty "current" in that they all get used a fair bit by many owners.
For my own part I have several A1200s here, my main one having the BlizzardPPC / BVision combo. This system is quite capable of doing everything I need it to, so I'm happy enough.
Asking about the perfmance of an AmigaOne is likely going to open a huge can of worms.
However, I prefer to look at it in relational terms to my 68040 / PPC based A1200s. I loaned a friends A1XE for a while (800MHz G4) and it is simply in a completely different class speed wise.
