Have the power the supply the other way around, the air is definitely sucked into the fan it and not pushed out of it, the air exits the power supply through the back. Also if your turn your hard drives around 180 degrees, your cables will look much neater.
Here's my build in the same case...
Good idea about the hard drives, don't why I never thought of that

PS, that is not an actual picture - I think you just posted the shell of the case without any wires connected

Seriously though that is a very good job, it almost makes me want to rip mine out and start over again, but I will wait until I get a better and modulared PSU I think.
Good job

And it's worse now 