Well my system is now up and running, building in this small enclosure was very frustrating with having to remove parts again and again but all turned up great in the end.
Final Specs:
CPU: Intel Core i7 4790k 4.4GHz
Mobo: Asus Maximus VII Impact
GPU: Gigabyte Windforce GTX780
Ram: 8GB Corsair Vengeance 1866Mhz DDR3 (2x4gb)
SSD: 120GB Samsung 840 EVO (Boot Drive & 120GB Kingston V300 (Games SSD)
HDD: 1TB Seagate (thinking of buying a 3TB Drive)
Casing: Silverstone Milo ML07 ITX (with 3x superfine magnetic filters)
Case Fans: 2x Corsair SP120 Quiet Edition 120mm Fans
CPU Cooler: Noctua NH-L9i Low Profile Cooler for ITX Systems
Sound Card: Asus SupremeFX (Add-on card with Maximus VII Impact)
Controller: XBox One Controller for Windows
Really pleased with the build. Its about the same size as the Xbox One but quite alot more powerful and easily up gradable. Runs super cool and quiet.