How accurate and how much do you want to spend. You can use a $700.00 progressive and be w/in 5 inches on depth. My old dynatel is more accurate than that and sells used for under a grand. Yes these new locators are great if you have deep pockets but in the end you still have to spot your hazards.
This is CABL.com posting #139535. Tiny Link: cabl.co/mKsJ