To add some fuel to the fire, I found that I actually preferred the sound of 3.6's to 2.4's. Yes, I can hear how from a transparency perspective, the 2.4's may be an improvement, but like many things, it is dependant upon your other gear and the interaction thereof. Attributes of the 3.6's which I prefer over the 2.4's mostly deal with conveying a sense of scale and weight. When I put on recordings of large orchestral pieces, the 2.4's did not do as good of a job as the 3.6's at convincing me there was a full-sized symphony orchestra spread out in front of me. The 3.6's also had much more low end, at least to my ears, but if you have a quality sub, this might not matter.
I'd stick with the 3.6's for now, and see if the 3.7's ever materialize.
I'd stick with the 3.6's for now, and see if the 3.7's ever materialize.