Well, there are a couple ways we could go here, for a mainstream system with good components that would be adventagous to you I'd recommend this build:
https
/pcpartpicker.com/list/zKC2mq
The Ryzen 7 2700X will be a fine CPU for you with nothing but the much more expensive Threadripper or Core i9 being superior in performance.
Speaking of Threadripper, 24 threads are better than 16.
https/pcpartpicker.com/list/Zvz8r6
Pretty much the same system, just dropped the 4 TB drive to fit the Threadripper 1920X into budget. You said you already had a SATA drive, so if you didn't want an upgrade for that drive then this would be a good way to go. More cores = faster renders.
Most of the other components are placeholders but would make for a great system anyways. The AIO liquid cooler will keep your CPU pretty chill, the 960 EVO is a great boot drive and an m.2 so you won't use up a SATA connector on it. The case is a personal favorite of mine and allows flexability in mounting the AIO cooler the way that you want to mount it and looks good doing it. The power supply is at what I feel is the perfect wattage for this kind of power user build and is fully modular to help keep the look clean. For a work station kind of machine I think that 32 GB of RAM is very healthy, and it is speedy so as to help the Ryzen family of chips perform at its best. As I said, the 4 TB drive could be dropped. More storage is always a good thing, but probably not too necessary.
I hope that gave you some ideas.
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