Personally, if the PSU is on the bottom (or even when it's on the top), I'd much rather have the PSU fan blowing out rather than in. There have been a few times when I've taken a PSU apart just to switch polarity on the fan connector. My current PSU doesn't even have a fan, which for me is a lot better.

Thanks chaps for the second opinions 

Yes I know what you mean Dave, my PSU tends to keep fairly cool though, so I am not too worried.  I'm anticipating that the case is well designed enough to dissipate most of any heat, it should do that by all accounts.

nice looking case 

Doesn't have PSU but you have a good one of those from what I remember.
The lower PSU means the (6A) kettle cable for it is low down. No real advantage/disadvantage.

Yes I have a high quality PSU in there, I forget what it is now, it may come to me later.  Kingston or Corsair I forget..

Corsair HX850...