When selecting a backhoe, you must prioritize the engine horsepower (typically 70-100 HP for standard models) and the maximum digging depth, which usually ranges from 14 to 17 feet. Additionally, evaluate the bucket breakout force to ensure it meets your excavation needs and check if the hydraulic system supports auxiliary hydraulics for attachments like hammers or augers. High-quality units should feature heavy-duty reinforced booms and reputable engine brands (e.g., Cummins, Perkins, or Yanmar) to ensure long-term reliability.