Hey,
I would say that, just like anything else with audio, it depends what else you are using.
I.E: if you use a 5000$ high SQ system, and 5$ yard sale RCA's, it will sound bad.
If you use a 50$ junky system and 50$ RCA's from some high end shop, it will sound bad.
BUT, if you use 50$ RCA's from a high end shop and 5000$ high SQ system, it will sound good.
In all honesty, try to get a good fit for what you already have