I went ahead and finally put an order down for my rig, needless to say I'm very excited for it! 
Here's what I went for :
Mobo : MSI Z77A-GD65
CPU : Intel i7 3770k (overclocked to 4.6)
GPU : 2GB Palit GTX 670
RAM : 8GB blue Corsair Vengeance 1600MHz
SSD : Sandisk extreme 128GB
HDD : Seagate 2TB 7200rpm 64MB Cache
CPU cooler : Phanteks blue edition (trying to colour match!)
PSU : Corsair Enthusiast TX 750W
Case : Corsair 600T White
Hopefully this will last me many years! I honestly can't see myself replacing anything 'till the next gen console war kicks off tbh
However I have a few questions, in looking at a 600t video I saw that the 200MM roof case fan came very close and partially obtruded the CPU fan (the CPU fan was a big one like my Phanteks). Does anyone with the case know if this is 100%?
Also apparently the 600T front USB 3.0 port isn't strong enough to plug an external HDD into it without its own power source. Is this the case and if so how can I avoid this problem?
Again many thanks guys, you've all been really helpful!

Here's what I went for :
Mobo : MSI Z77A-GD65
CPU : Intel i7 3770k (overclocked to 4.6)
GPU : 2GB Palit GTX 670
RAM : 8GB blue Corsair Vengeance 1600MHz
SSD : Sandisk extreme 128GB
HDD : Seagate 2TB 7200rpm 64MB Cache
CPU cooler : Phanteks blue edition (trying to colour match!)
PSU : Corsair Enthusiast TX 750W
Case : Corsair 600T White
Hopefully this will last me many years! I honestly can't see myself replacing anything 'till the next gen console war kicks off tbh

However I have a few questions, in looking at a 600t video I saw that the 200MM roof case fan came very close and partially obtruded the CPU fan (the CPU fan was a big one like my Phanteks). Does anyone with the case know if this is 100%?
Also apparently the 600T front USB 3.0 port isn't strong enough to plug an external HDD into it without its own power source. Is this the case and if so how can I avoid this problem?

Again many thanks guys, you've all been really helpful!