Cables

You've spent hundreds, thousands, or tens of thousands of dollars on your studio (the difference between one and the next is only a matter of time). Even the best cables are cheap compared to the rest of your hardware, so don't let a cable be the weak link in your signal chain. Cheap cables introduce noise, deteriorate your signal and cost you time in troubleshooting. Plus, cables are one of the few things you can "splurge" on and still not make a dent in your bank account, so get why not get the best?