Pigeonguyuk, i have the xspc ex240 in the bottom
http://www.overclockers.co.uk/showproduct.php?prodid=WC-084-XS&groupid=962&catid=1523&subcat=1525 and the xspc ex360 in the top
http://www.overclockers.co.uk/showproduct.php?prodid=WC-085-XS , its plenty enough cooling, I run BOINC doing milkyway and that hammers the GPU like 98% on each core but it never goes above 61c

, also do some cpu ones too and they batter the cpu but i have never seen above 50c like ever.
@ kipz, cheers will have a measure up and see what my best option is.
Pictures anyone?