Hi,
What is the PC going to be used for?
You seem to have a weird collection of high end components and cheaper parts. You don't need the P45 pro board, the only benefit with this over a P43 is the crossfire option. Also that CPU cooler is way too expensive, plus to make it work properly you'd need to add a fan. Do you actually plan on overclocking the CPU anyway, as the stock fan that comes with the CPU will be more than enough for this, or even a slight overclock.
The ram you've shown is too much, you only need 8500 ram if your planning on a rather large overclock. You can get 4gb of OCZ ram for the same price.
With the hard drive, you can get a 320gb samsung F1 for a little bit more.
I've managed to increase the size of monitor, include a better graphics card, 4gb of ram and a larger, faster hard drive for about £3 more.
You won't need anymore than a 400W PSU, the graphics card shown doesn't require any additional power from the PSU. The new wolfdale CPU's draw very low power, even when overclocked.
The above is a good setup, even for an entry level gaming system.