I dont have one and really don't know which one to get...suggestions? :wave:
Ford magnum has a really nice one...
Take a look at Oak Ridge Custom Calls. Jimmy has a fine trough call.
I played some at Nationals and the one I liked the most was made by Mike Lapp. Here is a link to a picture of it. Go down the pictures a little over half way until you find the picture with the sign that says "Champion of Champion Box Call: Stand-Along category then its the second picture after. Its the one with turkey tracks going down the side. There are also some of Mr Fords. His sounded real good too.
http://turkeycalljunkies.proboards.com/index.cgi?board=nashville1&action=display&thread=980
I believe that Olin Humphries out of Eatonton, GA is one of the gurus of trough calls.
Here's a list of guys that won at the Southeastern show in 2011.
http://www.dixiedeerclassic.org/results/2011/2011-callmakers-results.pdf