I would not be as inclined away from the LX4. I fll the biggest problem with the LX 5 and 6 is sidewall strength. If you swing wide and knock a fence post, you could really crumple one. And the original poster mention commercial cutting, where you have no idea what might be lurking...
An LX4 is smaller and far less likely to catch things, and you won't be using one commercially...
But there are other choices. I like Midwest, but none are around here, (they even come in green) And in a 4 foot size there ought to be lotsa choices (although the same applies, once you add chains and slip clutch to any of them, the Deere is priced right...)