i just have rubber grommets inbetween the drive bay and the drive and mine are silent.
Before you spend a fair bit of money on a high-end hard drive silencer, try rubber grommets out first. You could always get a proper hard drive silencer later if you're not satisfied with the noise levels.

I just put 2 x 74gb raptors in and I dont know why people say they are so noisy? unless im pretty deaf??!?!

I just put 2 x 74gb raptors in and I dont know why people say they are so noisy? unless im pretty deaf??!?!