I bought one of these last spring. So far it has been very good. I probably don't use it as hard as other folks will, but it works for me.
http://www.protraktrailers.com/

Here it was about a month ago.....

That is the neck showing out of the drift. I won't be using it for just a little while longer. Still too much snow.

I debated the gooseneck versus drop deck for the semi tractor for a long time, I finally decided I would have the most options with a gooseneck. I made an adapter to connect to the semi fifth wheel, and wired a brake controller and lights on the truck. I can use either the F350, or the semi, whichever is most available and most suitable for the task. I had my previous trailer set up that way, too. My previous was a Titan trailer. It was a very good unit as well.