jcarcopo, what is your ultimate priority? Ease and fullness, or more laser-like precision? The Aeris has more coherence, the Whisper more dynamic impact with ease. Between the two designs you cannot have it both ways. Make your choice. If you want to drive yourself crazy, keep second guessing. But, do not lie to yourself that if you have the "right" choice you can have it all. No, you can't, because they are different designs, both superb in their own right.
When switching from a more traditional dynamic speaker, the ear hears the quad of 7" mid-bass drivers. However, within about 1-2 weeks this becomes normal to the ears. Placement and toe in affect this dramatically. The Whisper will sound more full, plump than the Aeris. If you value more etched, delineated lines on instruments, then go with the Aeris. If you want more body to them, go with the Whisper.
You will get a more easy, relaxed bass with the Whisper. By that I do not mean sloppy, but mature, less stressed. The output will sound less strained at higher levels, relatively so, as both are large speakers with formidable bass drivers.
In the reviews of the V and Valor systems, one of my little games off the record was to see how close I could get the Whisper to the others. Pretty doggone close in several respects, but I had to add a pair of EXTREME XD Subs to do so. Not saying the performances were identical; the characteristics in terms of coherence and imaging were still characteristic of each speaker, but I found a way to enjoy the Whisper a lot, too. :)
Read my reviews of the different iterations of the Whisper at Dagogo.com