Budget gaming help

[Sret43rg]

Which system would be better for gaming on a 1920x1080 single monitor? I would like it to last atleast around 5 years of decent gaming.

This:
PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i5-3570K 3.4GHz Quad-Core Processor (£169.37 @ Amazon UK)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler (£26.65 @ Scan.co.uk)
Motherboard: Gigabyte GA-Z77X-D3H ATX LGA1155 Motherboard (£95.97 @ Amazon UK)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory (£30.96 @ Scan.co.uk)
Storage: Seagate Barracuda 500GB 3.5" 7200RPM Internal Hard Drive (£41.98 @ Scan.co.uk)
Video Card: MSI Radeon HD 7870 2GB Video Card (£180.94 @ Scan.co.uk)
Case: Zalman Z9 ATX Mid Tower Case (£34.99 @ Dabs)
Power Supply: Corsair Enthusiast 750W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply (£77.70 @ Scan.co.uk)
Optical Drive: LG GH24NS90 DVD/CD Writer (£13.98 @ Novatech)
Total: £672.54
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2012-11-18 16:26 GMT+0000)

Or this:
PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i5-3570K 3.4GHz Quad-Core Processor (£169.37 @ Amazon UK)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler (£26.65 @ Scan.co.uk)
Motherboard: Gigabyte GA-Z77-D3H ATX LGA1155 Motherboard (£77.69 @ Amazon UK)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory (£30.96 @ Scan.co.uk)
Storage: Western Digital Caviar Blue 500GB 3.5" 7200RPM Internal Hard Drive (£45.48 @ CCL Computers)
Video Card: XFX Radeon HD 7950 3GB Video Card (£216.98 @ Dabs)
Case: XClio Nighthawk ATX Mid Tower Case (£28.79 @ Scan.co.uk)
Power Supply: XFX 550W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply (£49.98 @ Novatech)
Optical Drive: Samsung SH-222BB/BEBE DVD/CD Writer (£11.96 @ Scan.co.uk)
Total: £657.86
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2012-11-18 16:28 GMT+0000)

I would go for the second build but i heard the XFX Double D 7950 has serious temperature issues and i can't afford any other 7950's which leads to the first build.

Feel free to post any suggestions or even a new build for £675 maximum.

Thanks in advance.

 

[Sret43rg]

Any suggestions/improvements?

 

[Sret43rg]

Please which one should i get D: im really not sure...