Was just wondering If this was the best possible upgrade for around £700? - I couldn't see any flaws with it myself, needed double checking. Thanks 
I have all the other components, hard drives, graphics card (GTX285) and case already.
Intel Core i7 860 2.80Ghz (Nehalem) (Socket LGA1156) - Retail
£226.99
Gigabyte GA-P55-UD5 Intel P55 (Socket 1156) DDR3 Motherboard Gigabyte
£144.99
Be Quiet! Dark Power Pro 750W ATX2.2 Modular SLi Compliant Power Supply £120.99
OCZ Gold 4GB (2x2GB) DDR3 PC3-10666C9 Low-Voltage Dual Channel x2
£139.98
Noctua NH-U12P SE2 Dual Fan Quiet CPU Cooler (LGA1366/LGA1156
£59.98
Total : £704.43

I have all the other components, hard drives, graphics card (GTX285) and case already.
Intel Core i7 860 2.80Ghz (Nehalem) (Socket LGA1156) - Retail
£226.99
Gigabyte GA-P55-UD5 Intel P55 (Socket 1156) DDR3 Motherboard Gigabyte
£144.99
Be Quiet! Dark Power Pro 750W ATX2.2 Modular SLi Compliant Power Supply £120.99
OCZ Gold 4GB (2x2GB) DDR3 PC3-10666C9 Low-Voltage Dual Channel x2
£139.98
Noctua NH-U12P SE2 Dual Fan Quiet CPU Cooler (LGA1366/LGA1156
£59.98
Total : £704.43