Sabertooth or Bundle Build?

Option 1:

Scan.co.uk Overclocked Bundle

CPU: i5 3570K @ 4.3GHz
RAM: 16GB DDR3
MB: Gigabyte GA-Z77-D3H

Pros: Comes overclocked and with a 600W PSU to replace my current 500W PSU.
Cons: No Sabertooth MB. Must use my old HDDs which means pulling them out of the old PC.

Option 2:

Scan.co.uk Today Only Deal

CPU: i5 3570K @ Stock
RAM: 16GB DDR3
MB: Asus P8Z77-V LX

Pros: Comes with a 3TB HDD and is £50 cheaper than the Overclocked Bundle.
Cons: No Sabertooth MB. Must use my old 500W PSU which means pulling it out of the old PC. Must buy new CPU cooler and PSU if I want to overclock in future.

Option 3:

My Custom Build:

CPU: i5 2500K @ Stock
RAM: 16GB DDR3
MB: Asus Sabertooth Z77

Pros: Sabertooth MB for overall better features and stability as well as future overclocking potential.
Cons: Must use my old HDDs and 500W PSU which means pulling it out of the old PC. Must buy new CPU cooler and PSU if I want to overclock in future.

All of these will be purchased alongside 2x128GB SSDs with a CoolerMaster HAF XB case.
They all come to an average price of £675.