@audio-b-dog - sonic memory is extremely tricky- I have to have the specific components or cable to hand and the ability to swap out to compare. It is a relatively rare thing to be able to tell immediately if a given piece is an improvement (rather than just a change). I’ll give you one example- I was running a very highly regarded line stage, and a dealer I trust brought over another unit. We plugged it in, let it warm up and I could tell immediately that it didn’t have the sonic qualities that made my system sing. Fast forward 6 months or so, the second line stage underwent a substantial revision. Did the same comparison in my system. I wanted to buy the "test mule" of it on the spot!
Cables are even trickier. I started comparing them back in the ’80s. The dealer (a different dealer) lent me 4 different sets. I played with them for about a week, and chose the set that sounded the best. It wasn’t the most expensive of the bunch.
Cables are also one of the last things I tend to do. There are some synergies, and some known matches with certain components, but a lot has to do with the overall voicing of the system and what you are after. I have very good cables in my main system and have had little need to upgrade- I did upgrade within the same brand the "earliest" cable in that system- from phono stage to line stage (the cable from the tonearm is captive) , but the core system has relied on the same cable since around 2007-8.
On my vintage system, I deliberately chose to use less vaunted wire-- I use Canare 4S11 and Analysis Plus--the system emulates what I was running in 1975, when audiophile cable was barely in existence. That system, having had all the components sympathetically restored--some of them owned by me for more than 50 years--sounds to my ears the best it ever has. Much has to do with the glass- I use a lot of NIB NOS tubes, including GEC KT66s.
The only thing I can suggest is that you work with someone who will allow you to try the cables and be able to return them without penalty.
I have yet to come up with a "holistic" approach to system building beyond the obvious in terms of impedance, power, room size, relationship between speaker and amp, and tonearm and cartridge (compliance). On the main system, if I change a rectifier in the phono stage power supply, the voicing of the system changes, sometimes dramatically. I’ve gone through quite a few to get everything just so.
I do hear differences when I compare in my room, with my system, under controlled circumstances. When I did the cables for the current main system, the manufacturer visited to swap out and demonstrate. I did not hear any difference on the power cable to my motor controller for the turntable, so passed on buying the high priced cable for that link in the chain.
Other random thoughts- when I was comparing different types of isolation devices for the tube power supply to my phono stage, I tried 1/2 dozen. Some lent more clarity, but at a price- greater stridency. I found a compromise that gave me the best of both worlds. Ditto on the record clamp/weight for the turntable. I have on occasion swapped out the aftermarket device for the factory one and still prefer the aftermarket unit.
Last thought (and much of this may be obvious)- the longer you can listen to evaluate, try a variety of different program material. It will be more telling. Some things impress initially but it’s longer haul evaluations that are more informing.
You can often isolate what a given component (or wire) is doing, but that does mean you have to be familiar with all the rest-- evaluations in dealer’s show roooms- different system/room make it much harder.
Sometimes I have to remind myself- this is supposed to be fun! Best,
Bill Hart
PS: @viridian's suggestion about making a recording if you have an A-D device is still a good suggestion even with a cartridge/stylus that has miles on it. You should be able to discern the difference, not relying just on sonic memory.