I had waited for six months on the JT, boilermakerfan convinced me to go instead with two matched Optivol for $56 and used the money saved to help buy a buffalo since I had all the parts except for the buffalo and IVY kits.
I would do a shootout with the dual mono OPUS, but I don't think its relevant since I only have the WM8740 Opus that I bought less then two weeks before the 8741 boards were released. If anyone has any decent ideas on how to update them at a decent price to the 8741 without some hardcore SMD soldering, I would happily listen.