I already have the 13s and love them, so was thinking about the 16s even before the freqphase thing hit. 
 
And I know the two amps are completely different, but you're right--freqphase seems to completely eliminate any advantage of the 3A... 
 
Anyway, my guess is ill be playing with the IEM designer until shortly before midnight on the 25th.  
 
If I were to need a high res Head-Case logo for custom artwork, where could I go about acquiring it?