We love categories. And idler is a killer category.
Maybe LGBTTY...XYZZZZZZZ can be mutated for audiophiles too.
Ked, idlers are at a natural disadvantage on classical. Their rumble characteristics mean that absolute cleanliness of reproduction is hampered compared to the best, zero noise belt drives or DDs, esp those w air bearings like Vyger or AS.
They are rhythm monsters. The trick is to minimise rumble, isolate from outside vibn, and mate w sympathetic/balancing tonearms, carts and phonos.
Get an idler w high torque and good speed stability, put it in an uber plinth, reduce rumble to the stylus, isolate from the world, mate w fast and accurate arm/cart/phono, and for outlay way below many so-called cutting edge belt drives, you will have a tt that nails music, both drive, and the delicate stuff too.
My rim drive cost me £1700 in 2013. To date, I've spent another £9-10k on it, and classical lps are the first thing I reach for. Knowing that only top eschelon belt drives costing multiples more might take me further, but not across the board.
Nothing can match the price/performance sweet spot for well sorted idlers.