How many 3.5" hard drives can you fit in there? It says 3+2Modular, but does that mean like only 3 if you use a video card or something?
Like many cases (my CM HAF is like this) you can remove a HDD bay if you have a ridiculously long GPU. I have a 6970 in there right now and it fits without removing the HDD cage.
Anyway, if you take out the HDD cage, it's only two. if you leave it in, it's 5.
I would recommend a modular PSU if you plan on using the bottom two bays for HDD's.
You can, of course, always forego the optical drive in favor of 1-2 more HDD's (depending on size).
It's pretty clear in this photo:
The removable HDD cage is harfway out, to show you it is removable.