Tips/suggestions on hard drives

Looking to get a new drive setup for a new build and wondering about some things.

Was going to do two 1tb SSDs in Raid with the media files, and a 1Tb Nvme drive with the cache and proj files with the OS on another SSD.

Would the Raid setup really be much faster than 1 good SSD? Is the location of where I wanted to put things going to the right spots or should they be reversed?

Any tips or better suggestions appreciated.