Tank322,
From reading your posts...you're really just looking for a versatile head that provides plenty of dynamic range (a head that responds with consistency when played softly or loudly). Generally speaking, 2-ply heads (heads made with 2 pieces of film) are going to be a little less sensitive than single ply...but they're also going to be more focused (controlled) sounding and more durable than 1-ply heads (heads made with a single piece of film).
Look, I work at Evans Drumheads...so I'm biased...but you might be better off choosing a more traditional 2-ply like the G2. It'll hold up as well as any other 2-ply, but it's sensitive enough to respond when played more softly or when tuned higher (more in a jazz range). It's still going to be fairly resonant. If you need to control the sustain and eliminate the troublesome higher frequencies...but you don't want to sacrifice the dynamic range...then the EC2 might be a good option.
I hope this helps a little.
Mike
Evans Senior Product Manager