Precision 7520 configuration choices

In December 2003, I bought my Inspiron 8600, in July 2009 I replaced it with my Precision M4400. Now it is time for me to move on to a Precision 7520 (and forget about the Lenovo P51 option).

Could you please help me refine my choices?

Precision 15 inch 7520 mobile workstation laptop – intended configuration & questions

1. Intel Core i7-7920HQ (Quad Core 3,10GHz, 4,10GHz Turbo, 8MB 45 W, with Intel HD Graphics 630) [Base: Intel Core i7-7920HQ with Thunderbolt 3]
2. Windows 10 Pro 64-bits Engels, Nederlands, Frans, Duits, Italiaans
3. NVIDIA Quadro M2200 with 4 GB GDDR5-memory
4. 32 GB (2 x 16 GB) 2.400 MHz DDR4 Non-ECC SDRAM
   1. Alternative: include cheapest DELL option and seperately buy similar (or 2667 Mhz) memory from Crucial or Crucial Ballistix: € 150 cheaper.
5. Primary HD: 512 GB M.2 PCIe Solid State-hard disk class 40
   1. Specs?
   2. Alternative: include cheapest DELL option and separately buy Samsung 960 Evo 500GB (M.2 PCIe 3.0 x4 interface, Samsung Polaris, Read 3200MB/s Write 1900 MB/s): € 150 cheaper.
6. Secundary HD:
   1. Use existing Samsung SSD 850 Evo 500GB (2,5” Serial ATA 600 interface, Read 540 MB/s, Write 520 MB/s, 256-bit AES encryption)
7. Intel WiFi Link 8265 2x2 802.11ac+BT 4.2 (vPro)
8. Intel® Dual-Band Wireless-AC 8265 wifi + BT 4.2 wireless driver (2x2)
9. 15.6" UltraSharp™ FHD IPS Touch (1920x1080) Wide View LED-backlit (72% color gamut) with Cam & Mic
   1. Is it a mat screen and/or Antiglare?
10. Internal backlit keybord - US/International (QWERTY)
11. Dual Pointing palmrest with fingerprint- and smartcardreader
    1. What does Dual Pointing mean?
    2. The more expensive option “with full security and fingerprint reader”: what does ‘full security’ mean?
12. 91 W/u (6-cel) Lithium polymer battery with long life span
    1. What is the disadvantage over the option ‘lithium-ion battery with ExpressCharge™’?

• 3Yr Basic Warranty - Next Business Day
• 3Yr ProSupport and Next Business Day On-Site Service
• 3Yr Dataprotection – Keep Your Hard Drive
• Asset Tag - ProSupport (Website, barcode, Onboard MacAddress)
• Image restore: Dell Backup and Recovery Basic for Win 10 [Included in Price]
• 180W Adapter + cable
• Diagnostic USB with resources
  • ???
  • Windows 10 Pro OS Recovery USB
    • ???

Any other tips & trics?

Regards and thanks in advance,
Ernest.