PCPartPicker part list /
Price breakdown by merchant
CPU: Intel Pentium G3258 3.2GHz Dual-Core Processor ($64.89 @ OutletPC)
CPU Cooler: Noctua NH-L9i 57.5 CFM CPU Cooler ($42.49 @ OutletPC)
Motherboard: Gigabyte GA-H97N-WIFI Mini ITX LGA1150 Motherboard ($104.95 @ B&H)
Memory: G.Skill Ripjaws X Series 8GB (1 x 8GB) DDR3-1600 Memory ($39.89 @ OutletPC)
Storage: Samsung 850 EVO-Series 120GB 2.5" Solid State Drive ($64.00 @ Amazon)
Case: Cooler Master Elite 120 Advanced (Black) Mini ITX Tower Case ($29.99 @ Newegg)
Power Supply: SeaSonic Platinum 400W 80+ Platinum Certified Fully-Modular Fanless ATX Power Supply ($105.98 @ Newegg)
Total: $452.19
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-10-12 17:09 EDT-0400
I know you implied that there is already a full-size case, but I made a super efficient and as high-quality small-factor pc which should also be super-stable.
I chose just 1x8Gb stick kit because that build has no importance on how memory is running
SSD for fast load and boot-up times, which is also high-quality model, known for it's stability and longevity.
Small, efficient cpu to run it all.
Cooler to keep it cool and quieter.
fanless, high rated and high-quality PSU for stability, reliability and quietness
no dedicated gpu since it isn't needed.