PC Build, opinions?

Hey Guys,

I'm building a PC at a budget of Approx. $1500

This is sort of where I have gotten after a couple of hours of tinkering and what not.

Opinions on this build? 
Anywhere I can save $$?

I am unsure about the power supply at this stage, I would love to be able to get a modular unit so I can have some pretty cable management in there,  

 [url=http://postimg.org/image/4w1smg4mr/][img]http://s21.postimg.org/4w1smg4mr/Untitled.jpg[/img][/url]

Not too bad of a build, but I would allocate your $ to other parts, like I've listed below:

[url=http://pcpartpicker.com/p/Pr4N]PCPartPicker part list[/url] / [url=http://pcpartpicker.com/p/Pr4N/by_merchant/]Price breakdown by merchant[/url] / [url=http://pcpartpicker.com/p/Pr4N/benchmarks/]Benchmarks[/url]

[b]CPU:[/b] [url=http://pcpartpicker.com/part/intel-cpu-bx80637i53570k]Intel Core i5-3570K 3.4GHz Quad-Core Processor[/url] ($209.99 @ Amazon)

[b]CPU Cooler:[/b] [url=http://pcpartpicker.com/part/xigmatek-cpu-cooler-darkknightiisd1283nighthawkedition]Xigmatek Dark Knight II SD1283 Night Hawk Edition 89.5 CFM CPU Cooler[/url] ($49.99 @ Newegg)

[b]Motherboard:[/b] [url=http://pcpartpicker.com/part/asrock-motherboard-z77extreme4]ASRock Z77 Extreme4 ATX LGA1155 Motherboard[/url] ($134.99 @ Amazon)

[b]Memory:[/b] [url=http://pcpartpicker.com/part/gskill-memory-f31600c8d8gab]G.Skill Ares Series 8GB (2 x 4GB) DDR3-1600 Memory[/url] ($64.99 @ Newegg)

[b]Storage:[/b] [url=http://pcpartpicker.com/part/western-digital-internal-hard-drive-wd10ezex]Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive[/url] ($74.99 @ Newegg)

[b]Storage:[/b] [url=http://pcpartpicker.com/part/samsung-internal-hard-drive-mz7td250bw]Samsung 840 Series 250GB 2.5" Solid State Disk[/url] ($170.51 @ Amazon)

[b]Video Card:[/b] [url=http://pcpartpicker.com/part/sapphire-video-card-100351vxsr]Sapphire Radeon HD 7970 GHz Edition 3GB Video Card[/url] ($425.91 @ Newegg)

[b]Case:[/b] [url=http://pcpartpicker.com/part/corsair-case-200r]Corsair 200R ATX Mid Tower Case[/url] ($63.98 @ Newegg)

[b]Power Supply:[/b] [url=http://pcpartpicker.com/part/xfx-power-supply-p1550sxxb9]XFX 550W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply[/url] ($59.99 @ Newegg)

[b]Optical Drive:[/b] [url=http://pcpartpicker.com/part/lite-on-optical-drive-ihas124-04]Lite-On iHAS124-04 DVD/CD Writer[/url] ($21.98 @ Newegg)

[b]Total:[/b] $1270.32

[i](Prices include shipping, taxes, and discounts when available.)[/i]
[i](Generated by PCPartPicker 2013-04-09 00:08 EDT-0400)[/i]

* CPU one of the best for the $.

* Mobo has just about anything you need and is cost effective too:)

* RAM has low profile heat spreaders and runs at 1600 mHz @ CAS 9 timings and runs at stock voltage of 1.5v

* GPU is >GTX 670, IMHO, but that is up to you to decide (costs about the same and can OC quite good too)

* Added a nice sized SSD for the OS, Apps, & several games. This sized SSD will allow you some breathing room for the items that I listed and will make your system quite snappy and minimize your load times in your games.

* Case is a solid option and comes w/front USB 3.0 ports!

* PSU will power any single GPU out on the market and is efficient (80 Plus Bronze Certified)

* CPU HSF is one of the better ones for the $.

Thanks very much Lunyone, I gone up to 16gb of RAM with the savings ;) 
I'm not so sure about the power supply though, will it be an issue if I added more drives or had a couple external drives running?

I don't want to doubt your expertise, but It's something I would be concerned with.
Thankyou very much for your quick reply though. 

The PSU isn't an issue at all as far as you should be concerned. There is 44A on the 12v rails, which is mainly for the GPU/CPU, but the PSU is efficient and 80 Plus Bronze certified (which is good).