one other caveat about the Thunderbolt display: older Mini DisplayPort displays won't light up if they're hooked directly into the Thunderbolt port on the newer LCD. Macworld's testing found that Mini DisplayPort LCDs can be added to a Thunderbolt chain and work as normal by hooking them into another Thunderbolt peripheral. It's unclear why simply hooking the older monitors directly into the newer ones doesn't work. For best performance Apple recommends hooking the Thunderbolt display directly into the Mac's port, then hooking Thunderbolt storage devices into the display's relevant port.