BTW honosuseri i'm only kidding with you mate, I hope you do realise i'm just joking, it's always good to get many opinions and system builds due to as we all know as system builders not all parts sometimes work well together even if they are the best bits you can get for the money. The bits I picked I also made sure they would work together well and as you have done too
My sig says it all fella, there are infinite possibilities

I don't hate your spec, I really can appreciate that you have taken time to balance it out and keep the rig looking tidy.....nice to see something in red if im honest, blue seems to be "in season" currently.
IC3 used the samsung RAM in his spec. Which is great RAM as it overclocks so well but on this socket running the RAM over 1600mhz makes lil odds really. I know it sounds anal to be so picky over a couple of pounds but these pounds slowly creep up across the build very easily. So I do my best to point out pros and cons for components that I spec aswell as others suggestions.....it's not personal
As much as the OP likes the look of your spec he is still hesitant to pay more than £650 it seems.
YOUR BASKET
1 x
Gainward GeForce GTX 560Ti "448 Edition" 1280MB GDDR5 PCI-Express Graphics Card £167.99
1 x
Intel Core i5-2500K 3.30GHz (Sandybridge) Socket LGA1155 Processor - OEM £161.99
1 x
Gigabyte Z77-D3H Intel Z77 (Socket 1155) DDR3 Motherboard £82.99
1 x
OCZ ZS Series 550W '80 Plus Bronze' Power Supply £49.99
1 x
Zalman Z9 Plus Tower Case with Fan Controller - Black £49.99
1 x
Corsair Vengeance Blue Low Profile 8GB (2x4GB) DDR3 PC3-12800C9 1600MHz Dual Channel Kit (CML8GX3M2A1600C9B) £44.99
1 x
**B Grade** Seagate Barracuda 7200.12 500GB SATA 6Gb/s 16MB Cache - OEM (HD-252-SE) £40.00
1 x
Gelid Tranquillo CPU Cooler (Socket 754/939/940/AM2/AM2+/AM3/LGA775/LGA1155/LGA1156/LGA1366) £24.12
1 x
OcUK 22x DVD±RW SATA ReWriter (Black) - OEM £15.98
1 x
Logitech K200 Media Keyboard (920-002733) £10.98
Total : £649.02 (includes shipping : FREE).
Yes i know you think its ugly and I've stupidly used a GPU with red fans alongside blue components.......even though the fans won't be seen lol

However that is £650 and he hasn't compromised too much on the components......i even got the keyboard in too
Wow, I didn't expect to cause an argument by asking for a spec
It's not an argument fella, it was a discussion. We do agree on quite a few points, I just found some of the posts to be misleading and I wanted to clarify what was what, that's all. 3 months is quite sometime off but it never hurts to get a rough idea of what you need.
On a £700 budget I would have done this perhaps
YOUR BASKET
1 x
Gigabyte GeForce GTX 560Ti "448 Edition" WindForce 3X OC 1280MB GDDR5 PCI-Express Graphics Card £179.99
1 x
Intel Core i5-2500K 3.30GHz (Sandybridge) Socket LGA1155 Processor - OEM £161.99
1 x
Gigabyte Z77-D3H Intel Z77 (Socket 1155) DDR3 Motherboard £82.99
1 x
Seagate Barracuda 7200RPM 1TB SATA 6Gb/s 64MB Cache - OEM (ST1000DM003) £65.99
1 x
OCZ ZS Series 550W '80 Plus Bronze' Power Supply £49.99
1 x
Zalman Z9 Plus Tower Case with Fan Controller - Black £49.99
1 x
Corsair Vengeance Blue Low Profile 8GB (2x4GB) DDR3 PC3-12800C9 1600MHz Dual Channel Kit (CML8GX3M2A1600C9B) £44.99
1 x
Cooler Master Hyper 612S CPU Cooler (Socket LGA1366/1156/1155/775/AM3/AM2+/AM2) £32.99
1 x
OcUK 22x DVD±RW SATA ReWriter (Black) - OEM £15.98
1 x
Logitech K200 Media Keyboard (920-002733) £10.98
Total : £695.88 (includes shipping : FREE).
If i had used the B grade 500GB HDD, I think the retail Ivybridge 3570K would be worth considering. How you balance the build though is entirely down to you fella.
Trouble is the offers change weekly (on the wed) so depending what comes up on offer, the specs we suggest can vary somewhat, as there are daily offers to consider too. If you like how purgatory has styled the build, then you might as well grab that case sharpish before it goes back up to £60.
If you want you could do the build incrementally, buying parts over a number of weeks or months. Purely grabbing things you want when they are at the best price, last week the OEM Ivybrige i5 3570K was £160ish and I would have tried to get that into the spec if I could
Start by getting a case and PSU, then grabbing a mobo bundle (CPU,RAM,Mobo) would make the most sense. That's enough for the rig to POST, you just need to add storage and a optical drive to get windows installed and for you to start getting some use from the machine
The GPU I would suggest you purchase last, the rig can use the IGP so it functions without a GPU. The nvidia 660 is on the horizon and even if you don't purchase one it could well shake up the prices.
Did you have a gander at the other sims i mentioned?