MiniDSP makes good products, IMHO, but the Flex has a limitation that may rule it out for many. Running Dirac Live the sample rate is limited to 48kHz. Perhaps future iterations of the Flex will improve (the SHD Running Dirac supports 96kHz), but for now it's too limited.
VTV D300 Digital amp
Very similar to the Peachtree GaN 1 but with more power and bigger power supply....Nice WBT jack option. Nothing to say about the sound, as yet....as this is just now being released and none have been shipped. But.....this thread is ready when someone gets one and can chime in with their findings. Just like the Peachtree, this one only has coax input.