Any Good Collections Agencies??? Looking to help PM

[Stephen Fisher]

Looking to help my property management company find a solid Collections Agency.  They have been incredible in dealing with my properties across the country and I'm looking to bring some value to them.  They have switched between several companies over the last several years with about a 5% success rate.  I love that they are still looking for solutions instead of subscribing to the "that's just money lost" mentality I have heard from other PM companies.  

Does anyone have any recommendations on Collections Agencies with higher success rates that operates in Tennessee and Georgia?