The OP has been steered into a alley way where there is doubt about their owned equipment, for this I am not responsible.
I am responsible for suggesting learning about Near Field Listening in Small Room and attempting to receive a demonstration of a device that has taken on an appeal.
The OP has been dragged through the briars backwards as a result of their inquiry on the thoughts on how to take their system to another level.
The encouragement to get rid of a Pre-Amp, get rid of the Cartridge, get rid of the tonearm wire, get rid of the Tag Wire, get rid of the Headshell, get rid of the platter mat, get rid of the Puck Weight, change the Geometry, and the like, all adds up to a bombardment of ideas, that a selection of will make an inexperienced individual run for cover from.
With the daunting effect of such suggestions, no wonder the OP leaned toward the idea of ditching what they own and starting afresh, and showed a curiosity about Vintage vs Modern Technics Models.
I remain in my earliest and later advice to the OP, Near Field Listening can prove to be a very satisfying experience when the disciplines for the set up are utilised, and to get out and share in demonstrations.
One good half hour spent in the right environment with experienced individuals is worth much much more than what forum talk can ever offer.
’Learn to listen and Listen to learn’