Looking for thoughts from Nottingham Analog table owners

So Notts owners, looking for some bang up to date information all in one place, here..lol.

Looking to change out the flavour a bit by buying another cartridge.
Present is Shelter 501 mk3, no intention to get rid of it but would like to try something different.
Budget say $1500 to $2000.
Thoughts?

Uber, an alternative suggestion. Don't know if you use US cleaning, but if not, that would be a big improvement. Another big improvement would be the Trans-Fi arm; that would leave you with enough extra to get a torque screwdriver to optimize cartridge mounting.

Terry I do us clean, and yes it was a big improvement all round
Had not considered an arm change at all

The change to my NAS Mentor (early model replaced by Dais) from NAS arm to Trans-Fi air bearing arm was dramatic. My NAS Mentor experience was, and is, very good, and only beaten out by my DIY air bearing TT. I have nothing but good to say about Trans-Fi and their air bearing arm - I now have two of them, one for each TT.

Just looking for thoughts on my present setup.
Nottingham Spacedeck with what I assume is standard Spacearm. On that point I am not sure as it came with the tt which I purchased used of eBay.
Running a Shelter 501 mk3 cartridge through a Gold Note ph10 phono stage.
Now I am very happy with the sq but as you know...changes are always calling out...lol.
So what would anybody consider to be the weakest link here? The cartridge or the arm?
And suggestions for either or just leave well alone.
Btw I did research the air bearing arm and really do not want to get into that at all.
Thank you