The one thing I really regret when buying my budget system was the noise from all the rubbish fans bundled into the case, graphics card etc. Now I'm on the verge of rebuying all the bits that are making the noise to silence it down a bit. I regret not spending the extra £30 in the first place. The fan on the window like the case has that you've chosen is a real culprit. I'd suggest getting an Antec case if you don't mind the styling being a little more subdued.