Nottingham tonearms compared to other brands?

I have experience only with the short (9") Space Arm, but I think that it's a great unipivot tonearm. It's much easier to set up than the VPI or Hadcock, by comparison, and it tracks very well. The armtube is carbon fibre thus the arm is quite light weight, so careful cartridge matching is a must, but with the right match it sounds great. The only caution is in regard to the tonearm wiring - it's very fine silver wire which requires a VERY delicate touch when mounting/unmounting a cartridge. Highly recommended.

Br3098, can you recommend a cartridge for the "Anna Arm" and the Space arm?

I have not but some here have; you could search the archive. If I remember right, the general consensus was that one would have to put an $2k or more Origin Live arm to better Spacearm mounted on the Spacedeck. I have no intention of doing it with my own Spacedeck. That arm is fine, just don't use low compliance and heavy MC cartridges.