Wheeled mini excavator?

This idea keeps nagging me for quite some time. With a tracked mini ex that tears the soil and is pretty much unusable on hardscaped surfaces I keep thinking about either getting or modifying a mini on wheels, preferably nice beefy balloons (definitely not a backhoe though).

They're not popular, especially at 1.5 - 3 ton range but Chinese made started to show up lately. Anyone has any experience with something like that?