For video up to and including 1080p (1920x1080), Sonnet recommends either the "Moshi Mini DP to HDMI Adapter with Audio Support" or the "Griffin Mini DisplayPort to HDMI with Audio + DVI". Many other adapters are poorly designed and have issues with proper color space.
For video up to and including 4k (3840x2160) which is supported by Thunderbolt 2, Sonnet recommends the Accell B086B-005B-2 Ultra Display Port 1.1 to HDMI 1.4 Adapter.
Thunderbolt connectors need to be in close physical proximity due to the very high speed board layout requirements. Sonnet thought it important to put the connectors outside to give rear panel access to connect additional Thunderbolt devices.
