Gaming PC;
CPU; i7 5960x CPU 8 core (oc 4.2ghz)
Memory; Vengeance LPX 2666mhz DDR4 16gb (4x4gb)
Motherboard; ASUS ROG Rampage V Extreme 2011-v3 socket.
Graphics: Titan X 12GB EVGA
PSU: RM 1000w Corsair
Storage: 1TB SSD boot / gaming - Various other drives.
Keyboard: Logitech G710+ (Use on Stream pc with mouse without borders too)
Mouse: Logitech G900
Monitor(s): BENQ XL2420Z 24", BENQ G2420HD 24"
Case: Corsair Obsidian 750d

Stream PC:

CPU; i7 4770k (oc 4.4ghz)
Memory; Vengeance LPX 1800mhz DDR3 16gb (4x4gb)
Motherboard; ASUS ROG Maximus VI Formula
Graphics: GTX 680 MSI Twin Frzr
PSU: HX 750w modular corsair
Storage: SSD various
Capture Card: Avermedia Live Gamer HD
Audio: 363d Sennheiser headset
Mixer: Behringer X1204
Compressor: Behringer MDX4600
Microphone: AT2035 XLR
Monitor: BENQ G2420HD 24"
Case: Cosmos 2

Total cost; Not worth thinking about :)