The Descent SMOKES the Depth in terms of speed, tonal accuracy, extension, and weight. I should know, I've owned both. The Descent has a way of blending with speakers that the Depth couldn't dream of. If your read some of the reviews on the Depth, you will see this hinted at. If you can afford it, the Descent is CLEARLY superior.
sub-woofer with ML Summits
I just bought a pair of ML Summits, and although I am still breaking them in, I adore them. I am brand new to this level of hi fi listening and not very knowledgable, but already I'm hooked. I had owned the ML Ascent i's and a ML Descent and loved them too before trading them in for the Summits about three weeks later. I figured I wouldn't need the subwoofer, and indeed I don't, but there's need and then there's need. I listen to mostly classical and jazz, often at quite low levels, and I'm wondering whether a subwoofer would flesh things out even better down below despite the Summits' marvelous tight bass. My listening room is about 15 ft. x 26ft. If the answer is yes, any suggestions which subwoofer? A Depth? Audio Physic? I'm in France so it's easier and cheaper to buy euro brands?