Silentmaxx or Scythe Quiet HDD silencer?

I can't decide between these two:

Silentmaxx
http://www.quietpc.com/gb-en-gbp/pro...olutions/hd525

Scythe
http://www.quietpc.com/gb-en-gbp/pro...ns/quiet-drive

I'm looking at silencing my Raptor 150Gb SATA drive and am wondering which one of these would be best. There isn't much in it money-wise but I just want to buy the best. I have read that the Silentmaxx doesn't work well if your case uses drive rails (my Antec Sonata does!) but as my rig is water-cooled I would be too worried if I can't secure it in the bay. I haven't seen any reviews that suggest there is a problem fitting the Scythe using drive rails but I guess it might suffer the same problem.

Which do you reckon is best? Do you think it will make a big difference to noise? I've checked my temps and the Raptor sits at 30-35c when computer is in use.

^bump^

Anyone?