Hey, Guys,
I spoke to John Strohbeen a couple of days ago. Here's what I learned about the new Ohm lineup.
The new 1000 is indeed a new point in the line that sits between the old MWT and the old 100 -- the cabinet and driver are of an intermediate size between those two older models.
If you have an Ohm Walsh model that was built within the past year, more or less, it has the same, new supertweeter as the new X000 line, so the top end should be identical. (Presumably, my 100's fit into this category.)
Unfortunately, the 100's cannot be upgraded with the 2000 driver. The diameter of the 2000's driver is just slightly too large to fit on top of the 100's cabinet.
Ohm continues to stick with its goal of having each speaker in the line possess the same sonic character, just generating different volume levels for different size rooms. John told me that the 2000 will play somewhat louder than the 100, and that its low end may have a bit more authority, but other than that, it should be very close. He told me that if I'm satisfied with the 100's, there's no need to upgrade to the 2000's, especially since my 100's put out more than enough volume for my current room.
You have to admire the kind of honesty that would lead someone to discourage an "up sell" to an existing customer!