Water Cooling Setup

Just looking for a bit of advice really, I have watercooled before but only a preconfigured kit, looking at building one from scratch for a new upgrade am planning.

Does the attached setup look ok? am aiming to use 2 x 240mm Rads on the back and top of case, loop will include both graphics and CPU.

My main question is do you reckon it would be worth putting an extra radiator in between the second rad and the graphics cooler.

Am going to stick it all in a server tower case we have at work and mod it so it doesn't look beige and rubbish.

Would there be much of a benefit in using 360mm rads over 240mm ones?

All ideas are welcome will stick a build log up when I finally get started on the case.

I wouldn't put the "extra rad" in, looking at you diagram you have a rad between the gfx and the cpu anyway.
You could exchange one or both of the 240's to a 360 though, I'm not sure how much actual benifit you would get. Personally if there is room I would probably go with a 360 and a 240.

It depends what what hardware is going to be in the loop. For example, my i7 and GTX580 is at about maximum what two 240s can handle in mine. Although I doubt you're going to have anything that produces more heat than that combination anyway if you're using a single card setup.