I think you can do better than what your local tech suggested.
Do you have a budget?
Start with the monitor.
I might suggest a 4k 43" monitor that has a displayport connection like this philips unit:
https://www.newegg.com/philips-bdm4350uc-42-5/p/N82E16824133396
I have been using the older 40" version for some time, and it works well.
I like the i7-10700K as a suggested processor.
If you are not in a big hurry, I would wait a month or so for the i7-11070K to arrive.
It will offer some 19% better single thread performance and it is likely to be competitively priced.
I disagree with liquid cooling. A top end cooler like the noctua NH-D15s will cool equally well as the gammax unit. It will be quieter, more reliable,cost half as much, require no maintenance. aio coolers do not last forever.
While unusual, aio coolers can leak with disastrous consequences.
The gigabyte motherboard has only a single hdmi output that can run 4k at only 30hz.
You want displayport output to run 4k at 60hz which the philips is capable of.
When buying new, newer tech is usually best.
I might pick this msi Z590 motherboard.
It has ample vrm power capability for a top processor, and has both a dp and hdmi rear panel output.
https://www.newegg.com/p/N82E16813144386
I would defer on the graphics card. I get nice performance at 4k using integrated HD630 graphics anf the Xe graphics of Z590 is supposed to be better.
It would pay to read motherboard reviews first which should come out soon.
Use only a ssd of some sort for everything.
A 1tb samsung 860 evo conventional ssd will be about $110.
A pcie m.2 samsung 970 evo would be about $130.
https://www.newegg.com/samsung-970-evo-1tb/p/N82E16820147691?&quicklink=true
The benefit of pcie is some 4x faster sequential processing.
That is not as good as it sounds, most of your work will be random.
If you want the absolute best and money is not a great concern, the samsung 980 pro 1tb would be $230:
https://www.newegg.com/samsung-1tb-980-pro/p/N82E16820147790
32gb is a good idea. g.skil is good, but buy a 2 x 16gb 3600 speed kit,
it should cost no more.
Do not go cheap on the psu.
Coolermaster quality is iffy., and I think the selected unit is way down on this quality list:
PSU Tier List 4.0 rev. 14.8 (END OF LIFE) Last Update: 27-07-2021 Legend : Gray - EoL/obsolete and/or otherwise not recommended for purchase. Green - small form-factor (gold and blue colors are disregarded due to scarcity of SFX PSUs) Gold - best units in the tier (includes requirements for blue ...
linustechtips.com
650w is fine
Look for a quality unit with a 10 year warranty.
Seasonic is always good.
Cases are a personal thing.
If you like "bling" many cases now come with all sorts of winky blinky lights.
Not for me, I find it distracting.
What you want is a case with good cooling. That would be at least two front 120/140mm intakes that are filtered. I would also want at least 160mm available for a good air cooler.
I recently bought this cm HAF XB EVO.
https://www.newegg.com/black-cooler-master-haf-series-atx-desktop/p/N82E16811119265
Easiest case ever to work with.
It has two hot swap bays in front for backup devices if you want.
A more conventional case might be the fractal design Meshify C
https://www.newegg.com/black-fractal-design-meshify-c-tg-atx-mid-tower/p/N82E16811352084