I have a REGA RP3 with a custom aluminum 3mm shim from Groove Tracer. Also, bought the reference sub platter, Acrylic platter and a Mapleshade vibration kit.Also, the upgraded Rega belt. Everyone of these upgrades elevated the table a lot. The RP3 is now super dead quiet and spins effortlessly on the sapphire and Cz bearing. I can now use a record clamp! It makes a world of difference, (JA Mitchel). The best cartridge match I can find for the RB301 is the Dynavector 10X5. This combo works best ...Full dynamics,bass,highs are sweet and effortless, midrange is full and rich with detail and accuracy. I could go on for a while....Total money spent on this Rega RP3 is $2000, with Cartridge! All I know is I would have to jump up to a 5k rig to get better sound. Now that's value!