Need a new computer.

Budget:
[$2,400 including shipping]

This is would be my second purchase from Digital Storm. First one has lasted 10 years. Want this one to last the same amount of time.

Usage:
Mostly working large excel files, FPS gaming. When I say large excel files I mean 500,000 rows of data and over 10,000 formulas. When I write a formula that has to cover all 500,000 rows it takes forever to complete. I need something that will do the formula all the way down the column fast.

Specifications:
I was looking to build my own. I just don't have time to do it. These are some of the items I would use if I built this myself. Graphic card has to handle 4 monitors.

Motherboard - ASUS ROG Z370 STRIX-E ATX

Processor - Intel® Six Core™ i7-8700K Processor

Memory - DDR4 3200MHz 32GB

Power Supply - 750M watt

Graphics Card - RADEON RX 580 8GB? Need something to handle 4 monitors.

Optical Drive - 24X DVD-RW Combo

HDD - 1TB

m.2 SSD - Samsung 960 PRO NVME M.2 SSD

I tried to config this here at Digital Storm but could not find all of these items in the custom config section.

If anyone could help me out with trying to build this and post the config number that would be awesome. Or config something that would do what my usage is that would be great also.

Thanks