I`m not a rich at all.......:=))
The way to true S.O.T.A audio lays not only in money.
My tip is:
Demo as much as you can, then choose your brands/house sound, then try pick a top of the line classic pieces of these (newer=usually lesser quality/sound for same MSRP) and buy used from some credible seller here or in eBay.
P.S. The wire/cable thing is crazily over-hyped. Leave these for last!
If everything else is already done and you like to buy a better cables then first play attention to the quality of connectors, conductor materials, AWG, etc., not for a brand name or fancy look.
Some research and simple DIY may save you a grands here, if constructing a very top end cables.
Just my 2c