Thanks for all the advice and input guys. I am looking forward to using it.
FWIW, the TractorByNet.com thread about Flail Mowers is huge. I have been reading it off and on and am only about 1/4 of the way through the 156 pages of posts. One thing that became pretty clear is that Rotary Cutters are pretty much an American (or North American) phenomenon . . that the ROW (rest-of-world) uses Flail Mowers. The other thing that became clear is that Flail Mowers are quickly becoming more popular among the CUT crowd . . guys like us. And that the Caroni 1900 is at the forefront. I spoke to a half dozen Caroni dealers in the eastern and southern USA and they cannot keep them in stock. Some of them attributed this surge in popularity and sales to the discussions over on TBN (the Flail Mower thread started in 2008 and is still going . . ).
The Flail Mower market in this country has historically been dominated by the expensive commercial units (Municipal Highway Departments and large landscaping companies) that are typically used for roadside and right-of-way maintenance. That seems to be changing.