So I listed all the parts... BUT. Stocked with the PSU. I'm looking for a 750w PSU and no idea which one to get, a modular or a non-modular? What's the benefits for each? I prefer Quality/Performace > Everything. Also, we're not doing SLI and oc'ing incase someone would ask. We're using it mainly for hard-gaming, streaming, vid recording. Thank you. 
PCPartPicker part list / Price breakdown by merchant
CPU: Intel Core i7-4790K 4.0GHz Quad-Core Processor ($279.99 @ Micro Center)
Motherboard: Asus Z97-A ATX LGA1150 Motherboard ($151.99 @ Mac Mall)
Memory: G.Skill Ripjaws X Series 16GB (2 x 8GB) DDR3-1866 Memory ($129.88 @ OutletPC)
Storage: Samsung 840 EVO 120GB 2.5" Solid State Drive ($88.98 @ OutletPC)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($44.99 @ Best Buy)
Video Card: Asus GeForce GTX 980 4GB STRIX Video Card ($549.99 @ NCIX US)
Case: Fractal Design Define R4 w/Window (Black Pearl) ATX Mid Tower Case ($109.99 @ NCIX US)
Power Supply: SeaSonic M12II 750W 80+ Bronze Certified Semi-Modular ATX Power Supply
Optical Drive: Lite-On ihas524-T06 DVD/CD Writer
Operating System: Microsoft Windows 8.1 Pro - 64-bit (OEM) (64-bit) ($132.87 @ OutletPC)
Wireless Network Adapter: TP-Link TL-WN851ND 802.11b/g/n PCI Wi-Fi Adapter ($19.49 @ Amazon)
Monitor: Asus PB278Q 27.0" Monitor ($429.99 @ Micro Center)
Total: $1938.16
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-03-11 06:38 EDT-0400

PCPartPicker part list / Price breakdown by merchant
CPU: Intel Core i7-4790K 4.0GHz Quad-Core Processor ($279.99 @ Micro Center)
Motherboard: Asus Z97-A ATX LGA1150 Motherboard ($151.99 @ Mac Mall)
Memory: G.Skill Ripjaws X Series 16GB (2 x 8GB) DDR3-1866 Memory ($129.88 @ OutletPC)
Storage: Samsung 840 EVO 120GB 2.5" Solid State Drive ($88.98 @ OutletPC)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($44.99 @ Best Buy)
Video Card: Asus GeForce GTX 980 4GB STRIX Video Card ($549.99 @ NCIX US)
Case: Fractal Design Define R4 w/Window (Black Pearl) ATX Mid Tower Case ($109.99 @ NCIX US)
Power Supply: SeaSonic M12II 750W 80+ Bronze Certified Semi-Modular ATX Power Supply
Optical Drive: Lite-On ihas524-T06 DVD/CD Writer
Operating System: Microsoft Windows 8.1 Pro - 64-bit (OEM) (64-bit) ($132.87 @ OutletPC)
Wireless Network Adapter: TP-Link TL-WN851ND 802.11b/g/n PCI Wi-Fi Adapter ($19.49 @ Amazon)
Monitor: Asus PB278Q 27.0" Monitor ($429.99 @ Micro Center)
Total: $1938.16
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-03-11 06:38 EDT-0400