Thanks for the suggestions guys. My situation may be unusual in that I want to do this stuff mainly for "fun". At some level I don't really care how many stumps I dig or how long it takes. There are enough stumps here to last three lifetimes, which is how I like it.
I've been following ads in my area for used backhoes and excavators for several months and nothing has got me excited. Most of the stuff in my price range is 20-30 years old, and I have a weakness for shiny new things, partly because I have no talent for fixing up old machinery. My role in life usually is to be the guy who soaks up depreciation costs so others can get bargains when I trade in my stuff.
I thought a long time about mini-excavators also but they just don't seem right for my purposes. I'd buy one of everything suggested here if I won a lottery though - I do get your points. (Note to self: buy a lottery ticket).
For what it's worth, here are some of my reasons (rationalizations?):
1. I don't need the weight or the cost of a cab or even a canopy. I'll only be using this thing when the mood strikes me, and I want to get into some fairly confined spaces.
2. The work sites are scattered over a 106-acre property, so I'd like to move from one to another without much fuss - no slow tracked vehicle, for instance, and no heavy footprint. Even my little JD755 makes big ruts with its loaded R1 tires. There's lots of side-slopes here also.
3. If a stump is bigger than I feel like tackling, I'll just make the path go around it and I'll call it a "landscaping feature". I'm not trying to prepare a field, say, where the stumps really have to go or the mission fails.
4. I don't need the loader feature of a regular backhoe or the blade on a mini-excavator (for example), as I've got that kind of implement for my tractor.
5. The Honda engine appeals because I've had good luck with other small Honda engines over the years. This thing will sit in an outbuilding much of the time, so any diesel probably wouldn't get used enough to justify its cost premium. (Maybe I should buy
two lottery tickets).
Still no opinions from owners/renters of the FCM towable rigs? I'm not sure if that's good news or bad news.
If I get this thing and it doesn't work out, it's ok to say "I told you so".
Thanks again!