if by corsair you are referring to the 800D(since there aren't that many cases bigger then the FT02
) then all I can say is it DOES have good airflow, but at a cost of dust.
as you can see here
there is 1 visible fan and 1 fan behind the corsair shroud attached to the drive cage. those are the only 2 "intake" 140mm fans in the case. here you see the intake fans get their air from a filtered source which is shared by the PSU
a tad of competition between the PSU fan and the case intake fan since we know air filter offer greater resistance if the PSU fan isn't spinning fast enough to counter the static pressure of the intake fans. if you have one of the modern PSU's that tend to have slow spinning fans at lower draw, you may very well be pulling hot air from the PSU if the intake fans are pumping hard.(or helped by the negative pressure of the case on top) this is less of a problem if you select the proper PSU so that when the fans are spinning hard, so is the psu fan.(high current draw)
now, getting to the problem of the case
I would like to direct your attention to above the mobo, behind the mobo, and below the mobo. those ventilation holes are completely unfiltered.... given there is a fan mount in the back shown in the picture and 3 fan mounts on top shown here
it's not hard to figure out that this is going to be a negative pressured case. (2 filtered intake vs 4 unfiltered exhaust + GPU exhausts) the static pressure of the case is going to be heavily negative and a large amount of dust will be pulled into the case over time.
given you have a FT02 and understand the physics behind what makes the FT02 what it is, I don't know if you are willing to put up with the 800D as a choice if you are looking for an air cooled solution.
you COULD however convert the 3 fan mounts on the top into intake fans(gonna need filters of course) and make it into a balanced pressure case (5 filtered intake vs 1 exhaust + GPU exhausts) 5 filtered intakes should provide enough CFM to make the case balanced or maybe slightly positive.(well, depending on how hard your GPU fans blow I suppose
)Edited by psyclum - 10/3/11 at 4:01am