Well, it's been pretty much unanimous that I alternate the batiks, so that is what I'll do! And I think that is probably how I would have voted too :)
Here are 4 blocks sewn together:
In hindsight, I probably should have done the preplanning for this quilt and done it in blocks of 4 pieces (two prints, 2 batiks) and then done the sashing - because it is a BEAR to line up those mid-block sashing pieces on a diamond! You cannot line up the stitching lines on the edge of the block like you can on a square block - you have to line up the stitching lines 1/4'' away from the edge! Diamonds with sashing is definitely NOT for the faint of heart! I'm up for the challenge, but it is definitely not for everybody!