fan speeds?

[Freddie589]

what is a good fan speed to be used as a top outake on a 700d i will have three fans at top, also if your feeling generous spec me a fan under £12 that will do the job well please!

thanks

 

[Schizo]

i have 2 of these (140mm ) in the top of my antec p190 on 600rpm and seem to be doing the job quite well.

http://www.overclockers.co.uk/showproduct.php?prodid=FG-001-FD&groupid=701&catid=57&subcat=4