Hey guys so I am back! After putting my computer into use of some demanding games it runs simply amazing. Now I have a good bit of extra cash that I am ready to use to improve my first build.

What I want:

PC Case:
I am going to be getting a full size tower (I will be taking advantage of it later down the road so I am going to go ahead and get it now) that has nice cable management, airflow, and looks.
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GPU:
I am upgrading my ASUS GTX 570 to a EVGA GTX 670 4gb. I am doing this because first of all the Asus GTX 570 is the biggest gpu I have ever seen in my life... Also I would like a little more power and one fan in the EVGA GTX 670 will be great because my case will have great airflow and I don't plan on overclocking much more due to it being superclocked by EVGA.
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PSU:
I am thinking about getting a modular PSU because my Corsair GS 700 is so bulky and probably will not fit in the back hatch of the new tower I am looking to get. Not currently sure what to get at the moment.

I will be updating with more things more than likely but as for now I would appreciate all your help and opinions! Thanks!

My Current Build:

CPU: Intel i5 2500k (OC 4.6 GHz)
Motherboard: MSI Z77A-G43
Memory: 8gb 1600 MHz
Graphics Card: NVidia GTX 570 (OCed 805 MHz)
Hard Drive: Western Digital 1TB 7500
Power Supply: Corsair GS 700
Computer Case: Rosewell Challenger
OS: Windows 7 64 Bit Ultimate Edition
Monitor: Asus VE248H 24in
Mouse: NAGA 2012

Pictures:
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This is my ASUS GTX 570, as you can see it is massive and hardly fits in my case. Also you can see the horrible cable management.
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Better view to see how messy it all is in my case.