The LF2200 does everything the LF2000 does and more!
Check these features:

• Sonde locating at 16 Hz (ductile iron),
  512 Hz (cast iron and nonmetallic),
  and 8 KHz (non-metallic only)
• Line locating at 8 KHz, 16 KHz, 32 KHz and 64 KHz (see our BuzzBox)
• "Sniffs" the frequency of any sonde or line exciter and locks on to it, from 16 Hz to 100 KHz
• Traces energized 60 Hz power lines
• Handle vibrates for "heads up" locating

Same easy-to-use LF tradition.
A great value at $1760 (with case)