[Sorry in advance for the length of this post! I think I’m reaching the home stretch at least…)
First off, thanks to everyone for all the helpful input. I’ve been researching myself to death (see below), so it really helps! I searched the Googles and found a lot of custom builders, many of which were aimed more toward gaming enthusiasts, so their packages were usually a little more than I needed. CyberpowerPC seemed to have a really good price on their Intel SFF custom build. I’ve copied an i5-8400/8GB RAM/240GB SSD/RX 550 build below, as well as a PCpartspicker list with everything as close as I could get. It looks like the CyberpowerPC came in about $20 cheaper, and obviously includes them assembling everything. Does this look correct?
CyberPowerPC:
--System: Windows 10 Home (64-bit)
--Extra Instant Rebate: $50 Instant Rebate l
--Case: APEVIA X-Qpack3 Micro ATX Cube
--Optical Drive: 24X DVD+-R/+-RW
--CPU: Intel

Core

Processor i5-8400 2.80GHZ 9MB
--CPU / Processor Cooling Fan: Intel Certified CPU Fan & Heatsink
--Motherboard: ASRock Z370M-ITX/ac mini-ITX
--RAM: 8GB (4GBx2) DDR4/3000MHz
--Video Card: AMD Radeon RX 550 2GB GDDR5 Video Card
--Power Supply: 450 Watts - Corsair CX450 80 PLUS BRONZE
--Hard Drive: 240GB WD Green Series Sata-III 6Gb/s SSD
Warranty: standard warranty: 1 Year Parts Warranty
Service: 3 Years FREE Service Plan (includes labor and lifetime technical support)
Total: $782
PCPartsPicker
--CPU: Intel - Core i5-8400 2.8GHz 6-Core ($209.89 @ B&H)
--Motherboard: ASRock - Z370M-ITX/ac Mini ITX LGA1151 Motherboard ($126.98 @ Newegg)
--Memory: Team - Vulcan 8GB (2 x 4GB) DDR4-3000 Memory ($104.99 @ Newegg)
--Storage: 240GB WD Green Series Sata-III 6Gb/s SSD ($90.00 @ Amazon)
--Video Card: XFX - Radeon RX 550 2GB ($89.99 @ SuperBiiz)
--Case: Apevia - X-QPACK3-WHT MicroATX Mini Tower Case ($48.56 @ Newegg)
--Power Supply: Corsair - CX (2017) 450W 80+ Bronze Certified ATX Power Supply ($23.98 @ Newegg)
--Optical Drive: LG - GH24NSC0B DVD/CD Writer ($16.88 @ OutletPC)
--Operating System: Microsoft - Windows 10 Home OEM 64-bit ($89.89 @ OutletPC)
--Case Fan: be quiet! - Pure Wings 2 120 PWM 87.0 CFM 120mm Fan ($8.99 @ SuperBiiz)
Total: $810.15
I’m hoping spending more on the processor now will, in fact, help future-proof me as much as possible. Never know if I’ll have the money/permission to upgrade items in a couple of years or not, and I'm guessing upgrading the processor is more work, may need a new Mobo, etc. But, since my uses are quite basic, I’m also worried that I may have gone with too much computer. I could probably knock $100-200 off the price by just getting a more mainstream build. Such as:
HP ENVY Desktop - 750-625rz
$549.99
Windows 10 Home 64
AMD Ryzen

3 1200 4-Core processor
8 GB memory; 1 TB HDD storage
AMD Radeon

RX 550 Graphics (4 GB GDDR5 dedicated)
DVD-Writer
CyberpowerPC Desktop Computer Gamer Master 2019W
$600
Ryzen 3 1200 (3.10 GHz)
8 GB DDR4
1 TB HDD
NVIDIA GeForce GT 1030
Windows 10 Home 64-Bit
Acer GX-281-UR11
REFURBISHED
$600
AMD Ryzen 5-1400 3.2GHz
8GB RAM
1TB HDD
Nvidia GeForce GTX 1050 2GB
Windows 10
Acer Desktop PC Aspire T TC-780-UR11
$630
Intel Core i7 7th Gen 7700 (3.60 GHz)
8 GB DDR4
1 TB HDD
Intel HD Graphics 630
Windows 10 Home 64-Bit
Dell Inspiron 5675 Desktop
$554.00
Certified Refurbished
Processor: AMD Ryzen 5 1400 Processor
Windows 10 Home 64bit English
1TB SATA Hard Drive (7200 RPM)
8GB DDR4 Non-ECC UDIMM 2400MHz (1x8GB)
AMD Radeon RX 560 with 2GB GDDR5
Dell Inspiron 5675 Desktop
$791.00
Certified Refurbished
Processor: AMD Ryzen 7 1700X Processor (Octa Core, 3.4GHz, 4M cache,95W)
Windows 10 Home 64bit English
1TB SATA Hard Drive (7200 RPM)
8GB DDR4 Non-ECC UDIMM 2400MHz (1x8GB)
AMD Radeon RX 570 4GB GDDR5
Or one of the XPS models, which have older gen processors and varying GPUs:
http://outlet.us.dell.com/ARBOnline...id=2202&c=us&cs=22&l=en&s=dfh&frid=197&~ck=mn
Thanks again!!!