Non standard fans in a ml350 G6 to reduce noise?

[Warbie]

The fans in one of our client's servers are going nuts - they go at full whack regardless of temperature. Changes in the bios have no effect. The server's out of warranty and is just used for the phone system and intranet and I just need to find a cheap way of getting the noise levels down. The fans look like standard 92mm jobbies - can anyone think of a reason I couldn't replace them with something like this?:

http://www.overclockers.co.uk/showproduct.php?prodid=FG-036-NB

Cheers.