AvoK95 wroteElement T is better ....but you should consider a case with 2 fans ontop so that if you have a long graphics card...the second fan suckes out the hot air out.
and also ....a 200mm fan would be slow so a 14CM fan can have more air flow than an 200MM fan
Ok...claims without numbers and proof...let's start:
So basically, with a top mounted fan, airflow (CFM) matters more than static pressure does. The fan is removing the excess heat and probably cooling the electrical components around the CPU socket.
Disregarding motor size, and assuming it scales proportionally with fan size,and assuming we have 2 fans with the same thickness and fan blade design, we get the following:
A 200mm fan would have an area of 3.14*10^2 = 314 cm^2
A 120mm fan would have an area of 3.14*6^2 = 113.04 cm^2
This means that for the same RPM, a single 200mm fan would move 3 times as much air as a 120mm fan.
The 200mm fans's max RPM is usually 800RPM, and it is silent. You would then need 1 120mm fan at 2400RPM (terribly noisy) or 2 120mm fans at 1200RPM (kinda quiet). The 2 120mm would probably vent over a longer distance of the motherboard, but it's not needed. Hot air would escape through the vent / fan anyways. The difference is a few cm only.
Now the element T's fan at the top is not replaceable by 2 120mm fans. Only the front is.
And what about the long graphics card? Most cards exhaust out the back. All stock cards do. Only few exhaust in case, and in this case hot air rises and gets sucked by fan / vents out. Second, he has a GTX 460 SE. I doubt he doesn't have a stock cooler on that. It vents out the back then. Intake is much more important in this case.
Don't forget to see this link too:
http://www.coolermaster-usa.com/landing/haf912/home.php?page=cooling
Basically, the HAF 912, in this case, seems to satisfy your conditions. He can replace the top fans. In this case too, I don't think the side fan makes much of a difference to temps. I'll be sure to get links to reviews that support that. How is the Element T a better case then?