You tried cables and heard what they can do and so you probably have a pretty good idea that it will be worth it if you can just find the right ones. This can be a whole lot easier than you think. Synergistic Research has been making really good really high value cables for so long now (going on like 40 years) there is a good fairly steady supply in the used market and since the quality over the years has been really steady you can simply find the best you can afford and be just about guaranteed of a good experience.
The Synergistic house sound is big and bold, smooth and detailed, and they all have very good imaging. Never any harsh hyped top end, never any anemic bass. Just good quality sound you will enjoy. The newer the better. But some of the older ones are depreciated enough they can be great deals. Like my Element CTS were $7500 new in 2005, now only about $1200, very hard to find anything that good around that price. Same goes for the lower end/cheaper wire. Not saying they are the best. Saying this is your high-percentage low risk move to get the kind of sound you will feel was worth the money.
The Synergistic house sound is big and bold, smooth and detailed, and they all have very good imaging. Never any harsh hyped top end, never any anemic bass. Just good quality sound you will enjoy. The newer the better. But some of the older ones are depreciated enough they can be great deals. Like my Element CTS were $7500 new in 2005, now only about $1200, very hard to find anything that good around that price. Same goes for the lower end/cheaper wire. Not saying they are the best. Saying this is your high-percentage low risk move to get the kind of sound you will feel was worth the money.