I'll agree with telescope. IMHO the L100 is the best speaker JBL makes. I do not like the ESS tweeter at all. Too bright and etchy. Some might mistake this for detail.
Compaing the ESS AMT ! and the JBL L100 speakers
A long time ago I heard a pair of ESS amt1 speakers and was really impressed. I'm in a position now to upgrade A LITTLE. What is available currently that is sonically better then these speakers for around the $1,500 price point for a pair ( or a LITTLE) more.