Cables make a difference but the preamp is the most important piece to get right. Get the best preamp you can afford. If you have cables you can sell so you can spend more on the preamp, do that too.
If you screw up on your preamp, you'll be spending a ton of money on cables to try and fix your mistake. It won't work, of course, so you might as well just do it right the first time.
If you screw up on your preamp, you'll be spending a ton of money on cables to try and fix your mistake. It won't work, of course, so you might as well just do it right the first time.