My first build for gaming

Hey so this is going to be my first time building a pc and wanted to know what people think of the products that i have been looking at. 

beginning with the case: Fractial Design Define R4 Black Pearl http://www.amazon.co.uk/Fractal-Design-Define-R4-Case/dp/B008NFWNFO/ref=sr_1_1?s=computers&ie=UTF8&qid=1369750100&sr=1-1&keywords=r4

motherboard: Asus Sabertooth Z77 http://www.amazon.co.uk/Asus-SABERTOOTH-Motherboard-CrossfireX-Supports/dp/B007KZQEHQ/ref=sr_1_3?s=computers&ie=UTF8&qid=1369749935&sr=1-3

Prossesor: i7-3770k / i5-3570k http://www.amazon.co.uk/Intel-Generation-i7-3770K-3-50GHz-Technology/dp/B007X1JM30/ref=sr_1_2?s=computers&ie=UTF8&qid=1369749935&sr=1-2 http://www.amazon.co.uk/Intel-Generation-i5-3570K-3-40GHz-Technology/dp/B007RUZKK6/ref=sr_1_1?s=computers&ie=UTF8&qid=1369749935&sr=1-1

Ram: 16 gb of crucial ddr3 BallistiX Elite 1866 MHz (2x8) Can't find the link to the product

Graphics Card: EVGA GTX 780 http://www.amazon.co.uk/EVGA-03G-P4-2781-KR-Nvidia-PCI-Express-Graphics/dp/B00CYHX7BQ/ref=sr_1_6?s=computers&ie=UTF8&qid=1369750356&sr=1-6&keywords=780

Power supply: Corsair TX 750 http://www.amazon.co.uk/Corsair-TX750V2-Enthusiast-Series-Bronze/dp/B004O0P9VC/ref=sr_1_cc_1?s=aps&ie=UTF8&qid=1369750543&sr=1-1-catcorr&keywords=Corsair+TX+750W+PSU

SSD: Crucial M4 256GB http://www.amazon.co.uk/Crucial-CT256M4SSD2-256GB-SATA-Internal/dp/B004W2JL2A/ref=sr_1_2?s=computers&ie=UTF8&qid=1369750627&sr=1-2&keywords=crucial+m4

Extra hard drive will be added later. Also about the prossesor will the i5 bottle neck the build or be just ok, will gaming ever use the hyper threading? If I go for the i7 will it be like giving away an apple for free and then buy it back aka pointless for the build?

PS: I am not buying the products from amazon because the cost of importing it is to much.

It won't be a bottleneck at all . Gaming won't really use hyperthreading , so i'd get the i5 3570k , the i7 is only necessary if you're editing. The 780 is a good choice , not sure what the minimum power supply requirements are but you could save a bit of money and just get a 600w PSU instead of a 750w which is a little over kill.

only get a 750 w power supply if you think you might want to add a second graphics card later