The most compelling reason to go with the ThinkPad Dock II would be to get the Ultrabay 2000 device bay and the half-height PCI slot. If you dont need either, then the Port Replicator II or Mini-Dock ...

anyone know of a good port replicator that mounts in the 3.5" bay. I'm looking for something that has usb, and heaphone capability, everything else is trivial, thanks for any advice ...