I've been considering this case and as you rightly point out, the limitation is the location of the PSU.

I thought of mounting the PSU upside-down at the area of the harddrive rack. Unfortunately that would mean it blows hot air to the front. Uncomfortable (and noisy).

I've seen one mod on hardforums where the PSU is mounted vertically blowing air to the base of the case (also at the harddrive cage area).

It would be interesting to see how you overcome this!

Thing is with this config is the PSU fan blowing towards the user. This would result in both heat and noise.

I guess if the rig is placed at floor level it won't be a problem. On a desk however....