I think the best hitch for you is whichever one you are going to learn to use well.
This is very important in that too many campers IMO do not learn their system enough to judge when an adjustment is needed or how to adjust in situations when tongue weight or TV loading are changed.
It is tough to know what is best for your setup if you have no experience with WD hitches. But, if you really trust your dealer and believe they will do a competent job, then I would recommend going with their recommendation. You will still need to learn everything there is to know about the hitch, however.
Just judging from the number of posts being made on FRF and elsewhere (and from my observations at campgrounds near me) the Equal-i-zer and Reese Dual Cam seem to be the most popular for trailers our size. They are popular because they have been around a long long time, are proven technology, and offer convenience in that sway control is built into the hitch.
Husky and Blue Ox have favorable reviews as well but are not seen as often in my area. This doesn't mean they are not as good as the Equalizer and Reese.
DW, 3 Kids and our Goldens
2012 Shamrock 233S
2008 Toyota Sequoia 5.7L 4WD