A stupid question for which there's no sensible answer.

My experience in conceiving and installing ~50 hifi systems leads me to approach your question as follows:
#1 get the magic triangle right: Room-Speakers-Amp. There is no such a thing as a great amp or amazing speakers. But there is definitely great amp-speakers combinations that fit best in certain size/shape of rooms (Bakoon Amp13R with Sound|Kaos Vox3A, Lumin M1 with Kef LS50, First Watt SIT3 with widebanders such as Cube Nenuphars, Crayon CIA-1T with Boenicke W5, Ypsilon Phaethon with Lawrence Audio Double Bass)
#2 speakers positioning v listening position, vibration control, minor room treatment
#3 DAC/source
#4 Power treatment (this is household dependent, it goes from fundamental to barely no impact)
#5 Pre-amp (I use VRossi L2se but as good as it is it only adds the last 10% of pleasure + tube rolling options)
#6 Cables upgrade etc (provided that in the first place you used good ones)
#7 Exotic audio stuff that keep the fun going 😁(reclockers, hermoltz generators, LessLoss speaker firewalls, ...). Two more thoughts:
1. Having a proper active sub and a high-pass filter to drive the main speakers is the upgrade of a lifetime. This alone merits a detailed post.
2. Best to plan #1/2/3 ahead of time to ensure you achieve adequate system balance (avoid over-investing on a top-notch DAC like the Mola Mola Tambaqui R2R with a pair of Kef LS50 down the line) and system ‘character’ (this is personal but you’ll see with experience what kind of sound gets you to sing & dance vs merely checking if the drum kick goes down to 28hz or not 😱). Above all enjoy listening to the music you love and share your passion with friends & family!

Goodness WillieWonky, you must surely have your tongue in both cheeks.

Possibly in order to sell his turntable which at that time was his only product, Ivor Tiefenbrun used to say the source was crucial - garbage in, garbage out.  Indeed, since he made more money out of the TTs that Linn made themselves (unlike their arms and cartridges made in Japan), he said the TT is the most crucial.

Not sure I go with Ivor there, but there must surely be truth in this source doctrine since a poor music signal can never be corrected by the down-line components.  Indeed the errors will be amplified and rendered truthfully in all their ugliness by the best amplifiers and speakers.

But all the posts above ignore one very big element - component matching.  It is essential to see the system as holistic.  It's no good buying a string of top-price, well-reviewed pieces and just assuming they will work well together.

Nice relevant article on “setup”:

https://news.google.com/articles/CBMiZGh0dHBzOi8vd3d3LndoYXRoaWZpLmNvbS9hZHZpY2UvdGhpbmdzLXRoYXQtbWF...

I find that the sound changes when I eat red or black licorice. It’s much cheaper than swapping cables.

The poster said he was good with the amp/preamp and speakers. Still about half the responses referred to these in some form or fashion, jeeeeezzzz. Read the post and respond accordingly. Answer is source. Clearthinker noted the garbage in garbage out analogy. A more succinct statement does not exist. Not necessarily the TT in all cases but the answer is the source you're using. BTW, all of the do-hickeys and thing-a-ma-bobs down the line all together have a <10% effect on  results (this does not include room acoustics as well as set up and placement). As for all the salespersons touting their amps and speakers, always remember "One mans floor is another mans ceiling". AB