Stud Finder

Hey guys,

I’m looking into getting a good stud finder (max $50). I need one that can also detect metal pipes, electrical etc. 

I’ve been eyeing either the Zircon hd900 or the L550 but I don’t know if it’s worth the cost. What do you guys think?

I know there is a thread already about stud finders, but the recommendations from that thread can only detect studs.

Thanks in advance.

-venodanz33