Nottingham Interspace vs Pear Audio vs Analogue Works

I understand, you have to choose without auditioning.
I've been playing original Nottingham Spacedeck/Spacearm for years and intend on keeping it that way. Yes, Nottingham is a very well established company and a very popular brand in some circles, even more so in Europe. Newest Interspace deck/arm should be close enough to the original Spacedeck, though I have not heard it.
Personally, I might choose top of the line Pear Audio over Nottingham Dais but I would almost certainly choose the Interspace over entry level of anything !

If you get the Nottingham make sure to replace the stock felt mat. I and many others use Boston Audio Mat-1 graphite mat. 

No hum in my system, though it's not all completely quiet because of the phono stage.