Adobe and Gaming machine

System specs

M/B Gigabyte GA-Z77-DS3H
CPU i5 3570K
GPU 2GB EVGA GTX 670
RAM 16GB (4x4GB) Corsair DDR3 Vengeance
SSD 240GB Corsair Force Series 3 - 256GB Crucial RealSSD M4
HDD Any 1TB
PSU 650W Corsair Enthusiast Series
Monitor 27" Dell U2711

Hi Everyone this is my first draft of components.

The system will be used for Photoshop, Flash, Illustrator and Games.

I'm not fixed on any of the components and would be willing to replace with any suggestions. The reason I pick a low end M/B is I really don't need all the extra gadgets on the higher end M/B's, but would be willing to change to another on advice.
I put 2 SSD's on the list but I only need 1, these 2 were the same price, I've no idea which is the better one.

Also would need a cooler as I would like to have a go at O/C but only to a mild level.

Again have no real idea about RAM and which is the best to go for.

Any suggestions or advice would be appreciated.

Please suggest any parts available in UK.

Thanks Jon