There are 2 things to think of ... the 3xS/PDIF board is reality, while the HDMI2MHR thingy is still only a rumor ... and 2nd, the price of the 3xS/PDIF board is pretty reasonable, while I am pretty sure the Meridian gadget while be more pricy (this speculation is solely based on the price of the 519 and the Z3 board for the 565).