You will need to experiment. Even with a LOT of test equipment (and the engineering experience to go with it you can't predict the sound ahead of time).
That is why places that allow use & return exist.
You CAN narrow the field a bit by finding cable with low vs. high inductance - e.g look at Kimber's uH per m specs. and compare to others.
Buy some cheap cable and use against the others to test against it. Be sure to do the testing blind and see what you find out.
Silver won't change anything except your wallet size, and there is no reason at all to spend a lot of $$ on cable, tho various configurations can change the sound (tho they may not universally improve it).
That is why places that allow use & return exist.
You CAN narrow the field a bit by finding cable with low vs. high inductance - e.g look at Kimber's uH per m specs. and compare to others.
Buy some cheap cable and use against the others to test against it. Be sure to do the testing blind and see what you find out.
Silver won't change anything except your wallet size, and there is no reason at all to spend a lot of $$ on cable, tho various configurations can change the sound (tho they may not universally improve it).