There's always more to do to make your workstation Perfect. Second, you can only start where you are. As you get going and learn to do & expect more of your work & footage, you'll get irritated at your system's ability to make it happen. Timely. Pretty. And when you reach a certain irritation level, you find the cash to do something about your cache, so to speak.
As noted on the Hardware forum's Tweaker Page, it's really all about balance. A 2200 horsepower drag-racing motor/transmission wouldn't be of any use whatever in a Volkswagen bug. Throwing 64 gigs of RAM in an older motherboard with an old video card isn't wise or even useful either.
Multiple core CPU's are good. More cores are typically better. BUT ... you need a motherboard under that chip that can handle a good through-put of data in many streams. And you need RAM sufficient to keep your chip and mobo running at their best. But more than the chip/mobo can really utilize is just wasted money.
Video cards ... nVidia still tend to do up to twice as fast work in the Adobe video programs as "equivalent" AMD-chipped v-cards. Within nVidia, some cards are better, and not necessarily more expensive. vRAM on card counts of course. As do several other variables of v-card design. There's info on that on the tweaker's page also.
And naturally, disc/storage & the way it's wired together count. Splitting the read-write tasks of the computer between different discs is wise. Faster discs are wise. So you can say have programs on one disc, footage on another, and project files on a third internal and do better than all on one. Or rather than discreetly handled separate discs, an alternate path is say programs/OS on one disc, and a 4 or 5 disc RAID array for all footage, project files & such, all discs in the RAID of 2T-bytes or better. That kind of system can supposedly scream.
So for now, start where you are. Read the tweaker's page articles, note what features you use, and figure out which subsystems are the most important for how you'll be working. Plan your next machine. Realize there will probably be upgrades to that machine until it's time for a new mobo underneath everything, at which point ... you'll have another machine.