With shipping, it's only $331 from Touchboards, but that is probably a pre-order as another site (Dale Pro Audio?) indicates it won't be released until September. If Touchboards is a reliable seller, that is a pretty smoking deal as it seems pretty comparable to the 611. Only real question seems to be if it has 4 discrete audio channels and if the input for the other two channels is through a single RCA (SPDIF) rather than the dual RCA inputs of the 661. If it could do 4 channels via XLR x2 and RCA x2 that would be pretty great. And of course, battery life is a big question mark especially when going 4 channels.