As for the graphs, I really wish I remember better what a bump at "xxxx" hertz is supposed to sound like. Depending on where the bump is, it may sound forward, or chesty, or something else perhaps. The two spots where it looks like it is least linear to me are somewhere between 800-900hz, and 4000-5000hz. I wonder what that is "supposed" to sound like.
I'm sure everybody exaggerates the specs, but the NRC test put the sensitivity at a low 84 db m/2.83v. That along with its 4 ohm rating might mean that you're going to want more than average power.
If it was me, I'd go with the T6 if this was an HT system, and the Two B if this was a music based system. If its 50/50, I'd probably still go with the Two B.