The MS speakers ARE settling in well now, with continued use. Dialogue appears to sound more natural than the Jamo and definitely much better sounding with music. What really sets the Jamo apart from the MS is it's subwoofer. The SUB200 is simply superior and with 200 watts, is far superior to the MS sub putting out 65 watts (although arguably, still good!)
I've tried both speaker set ups with the same movies (the usual suspects, i.e., Transformers, Iron Man, King Kong, Dark Night) and as a whole system, the JAMO wins for it's clear, lucid presentation and superb bass.
I then tried the MS with the Jamo subwoofer, and PRESTO - this is what I was looking for! Now, it sounded better than the Jamo, so I might just keep the MS and add another subwoofer. Still carrying out further tests with other dvd's and music to be absolutely certain of my choice.
The MS just looks so much better than the Jamo's - that's what's swaying me at the moment.