After swapping over a couple of SATA cables to the right angles ones (got the right angle going into the back of the hard drives so there is less pressure put on them from the side panel) everything seems pretty good.
Have just fitted a 120mm fan to the bottom of the case and one to the roof, pleasantly surprised at how easy it is to take the whole case apart. The fans connected directly to the PSU are only spinning at about 500-800 RPM so are inaudible, so the only thing i can actually hear in the case is my Tuniq, and even that is a very dull woosh as it is only at half speed.
All in all i am very happy so far with the cut down of noise (having come from 3 80mm fans), will probably get myself a fan controller to fit at the front just to be able to speed the fans up a bit.
The only issue i have had, which i have commented on in my post in the overclocking section, is that the new overclock i tried - 400x8 @ stock volts, seemed fine, but on running prime95 instead of just failing one core, it stopped recognizing my hard disk and corrupted my profile so have that to fix later on tonight.
Temperature-wise, after about 30mins the cores were sat at 64 60 61 63 ( i think).
/Edit I have now ordered the acrylic side panel for the case, so will be able to post some decent quality pictures of it once it arrives next week some time.