Hey Justin,
For what it is worth, I own the ProMedia 4.1 and I thought they were great....
I like the Boston's better (after listening a couple of days) cause they sound like real home speakers..My Klipsch have no mid-range and the BA do.
Also, there is a lot of music that plays low notes that my Klipsch distort..the port starts to make noises and the BA does not.
Lastly, if you know anything about audio, the low frequency differences you talk about can only be heard by a scope and not really by the ear.
I love my ProMedia..I am glad you like yours too..but, I have to admit that the new Boston's are better!
Just my 2 cents worth (which isn't worth a lot)
Either way, I own 2 kick ash pair of speakers