I think NAS-purposed drives are better choices than desktop models. For instance the 1 TB Seagate Ironwolf, or the Western Digital WD10EFRX. Mixing either with the Barracuda will be fine.
Red disks are generally better, yes... when I got my NAS, I was cheap, and I put in a black hd from my current desktop, along with two red disks. Guess which disk failed first ?...
From one of my friends, who's doing this for a living, I've got that it's generally better to buy similar disks from different vendors, if you're buying several disks at the same time.
Because there is a small probability of catastrophic failure, what if you get all disks from the same batch, and they all fail at about the same time, before you've recuperated from the first failure.
In any case, stopping all operations on a NAS as soon as a disk fails, and replacing the failed disk ASAP is best practice.
I buy over a few months or different suppliers for the same reason. I have been very happy with the 10tb irobwolf drives. They do have a slowly increasing load cycle count which won't hit design life for 7 years and as I am living on a boat which moves the aggressive unloading of the heads is probably not a bad thing. I also allow the drives to sleep, in my 626 there have been no issues. I also have a couple in my old pro6 running OS 6 and they are great but I don't currently spun them down.
