Get the Equal-i-zer 14,000/1400 and the 2.5 shank and you won't go wrong at all.
My TT (signature below) is right around the same weight as yours, and with camping gear, food, water, etc, the WD hitch is still within good range.
The 2 inch shank sleeve? That's what I'm using, and if you can avoid it, do so. The sleeve has movement, and then the hitch shank has movement. This is just normal because the hitch pin hole is slightly bigger than the pin, allowing for movement. It's kind of un-nervy at first hearing and feeling a slight klunk-klunk from the hitch, but after you realize it's jsut the nature of the sleeve, you eventually just ignore it. However, if I were to do it again, I'd certainly want the 2.5 inch shank to eliminate some of that movement.