Where to go from Basis 2000/RB300/Glider?

Keep your Basis 2000 (assuming it is in perfect to excellent mechanical shape), purchase a Graham 2.2 tonearm and a Helikon SL LO MC cartridge and enjoy your LP collection all over again.

I think the table is the place to improve. If your selection is limited to the brands you mention, I'd lean toward the Nottingham Hyperspace. But I would depart from Nottingham at the arm. The Origin Live Encounter or Silver arms would be a better choice if you want low compliance cartridges like Shelter. Member "4yanx" just heard a Hyperspace with a OL Illustrious arm and Shelter 901 and seemed to think it was extremely good. It showed as well as the Teres 255 in that demo. That is good performance in anybody's book.

Keep your Basis! Upgrade your arm to a Basis Vector, (trading in your Basis rb300) and look at a Shelter 901, Sumiko Celebration, or maybe a Koetsu. The Benz and Basis are not a "synergistic" match in my book. They are often sold by the same dealers as they both have the same distributor, But they just do not go well together.

Maybe have OL do the Origin Live Mod to your BAsis 300 (thus keeping VTA), and get a more involving cart. Benz's put me to sleep......... I feel like i'm watching a movie in panoramic view with the Benz's (L2 and Ruby) - wayyyy to distant and non-involved. Just going to a more involving cart really brought the enjoyment back! It's the arm and Cart combo, as the TT allows what you have as a pickup device(Arm/cart) to shine through.