There is only one old WD2500JB. I gave up on WD 7.2K drives after that, since every one of the drives I purchased (800BB, 1000BB, 1200BB, 2x1800BB) had moderate to severe idle noise.
Most of the drives are 200 and 250GB DM+9s, with two each 200GB Hitachi 250GXP and 200GB Seagate 7200.7 (just...