It's taken me years to get to this setup, but keep in mind that you don't even need this fancy of a hardware setup to get quality results with your music.
Many producers have less than this in their studio and are pumping out higher-quality music than I am capable of.
Don't let your computer be a limiting factor in your output or workflow. Also, having an audio interface, to me, is of utmost importance. You won't need so many channels -- even just a basic one or two-channel interface can do the trick.
Let me know if you have any questions in the comments section! Thanks for watching. =D