Sonnet's no stranger to the Thunderbolt peripheral game and it now has three new Thor-approved expansions to ship. The Echo Express adapter packs one X4 mode PCIe 2.0 slot of the x16 flavor, an extra opening for a connector plate or a double-width card and clocks in at a sizeable $599. At a heftier $899, the Pro model sports two of the same slots and support configurations with larger cards. The externally powered aluminum housings each feature an extr
