It's impossible to buy a good sound. Everyone has a different ear for what good sound/tone is. Also, there are a lot of factors that contribute to good sound/tone. Training your ears with your monitoring equipment and knowing how your adjustments in the mix affect what you hear in your monitoring system is the only way to get the sound/tone you seek. It takes a lot of trial and error, and a lot of sampling over and over to get the mix just right. And if you're good, it takes a lot less effort.
You can accomplish the same thing with $50K worth of gear, or a $100 DAW and interface.