I recently upgraded from the Summit X to the Expression ESL 13A in my media room (previously I had also updated from the Stage X to the Focus center channel several months earlier). This time around I got a custom color instead of a standard finish to closer match my Focus center channel. First let me comment on the quality of the finishing, packaging and workmanship. I saw all this and more first hand at a visit to the Canadian plant so I was not surprised but it was all very well done. Also now that I have purchased several ML products over the years (Summit X, Descent I’s, 212's, CLX Art, Focus, Vanquish) the packing is very good and they have all arrived in great condition. I know packaging is probably not the most talked about topic but we do want our product delivered in good condition. Believe me it’s no accident that they do it’s that good. I must admit I was not an immediate fan of the new look compared to the Summit X's that I had at the time. I was not able to see anything in person until a couple of years ago at Axpona where a pair of 15A's were on display. What I saw on line the new ones just seemed to industrial looking. The much bigger boxy lower end seemed so much bigger then past designs so I was concerned that visually I would not like them as much as the Summit X's. Well let me tell you once I saw them in person I was much impressed with the new design, the much beefier frame and particularly the sound. Being familiar with ML speakers I came to love the clarity of the sound and the new 13A’s just make you smile so much more. The wider panel helps, the much sturdier frame helps but probably the biggest improvement is in the bass section. Yes it’s larger but its sooooo much better. Most likely a combination of the improved amp, the actual enclosure and the calibration software. I was first introduced to the calibration software with my purchase of a couple of 212 subs. It made a tremendous difference in how the bass played in my room and I was not disappointed in how after calibration the bass on the 13A’s sounded – tight, deep and fast just how I like it. I also believe the integration with the top panel is even better with the 13A’s as compared to the Summit X’s. That is saying a lot as I thought the Summit X’s were very well integrated but the new ones are even better. My setup is multichannel not two channel like my Summit X’s were before being moved into the media room. So I don’t have much experience on two channel performance but my gut tells me they will perform nicely and better then the Summit X’s. All I can say to the ML development team is you have hit it out of the park with the new lineup. It was a tough thing to accomplish but it’s nicely done – Visually and Sonically. Not just a small incremental improvement but justifying the new models as they are aptly named.