MacBook Pro 16-inch ($2800)

2.3GHz 8-core 9th-generation Intel Core i9 processor
Turbo Boost up to 4.8GHz
AMD Radeon Pro 5500M with 4GB of GDDR6 memory
16GB 2666MHz DDR4 memory
1TB SSD storage¹
16-inch Retina display with True Tone
Touch Bar and Touch ID
Four Thunderbolt 3 ports

Upgrade processor to 2.4 GHz, Turbo Boost up to 5.0 GHz ($200)
Upgrade memory to 64 GB ($800)
Upgrade graphics to 8 GB ($100)
Upgrade SSD to 8 TB ($2200)

==> $6100

AppleCare+ for 3 years ($380)

USB-C to Lightning Cable 1m ($20)
USB-C to Lightning Cable 3m ($35)

Not planning on using it since I plug in my iPhone and iPad to the monitor USB hub. But just in case.

USB-C to USB Adapter x3 ($60)

One for Drobo, one for monitor USB hub, one for optional second external drive (for disk to disk copy mostly).

Moshi USB-C to DisplayPort Cable 1.5m x2 ($100)

My Dell displays U2415 and U2717D have DisplayPort connectors and Thunderbolt 3 to Thunderbolt 2 adapter won't work. Closest Apple solution is USB-C Digital AV Multiport Adapter + HDMI cable. Hopefully this 3rd party product works as advertised.

==> $6700 + $645 tax and recycling fee = ~$7350