Get the 2500k, use the money saved for a better GPU. HD 6950 or GTX 560ti. And I don't see a monitor, but for budget I like the ASUS 24 inch LED models.
I had a look at the GPU and the monitor. I really like the monitor, but what do you think of the samsung syncmaster? i heard they were really good so im not sure what to use... Also with the GPU, is it the Sapphire HD 6950 "Dual Fan Edition" 2048MB GDDR5 PCI-Express Graphics Card? (i just copied the title from OC uk) it looks awesome, so i will definately use it thanks