Another vote for the B/W. Great product, made in the USA and great support from the manufacturer should you ever need it. I had an old cheap hitch once (from China) and I literally needed a rubber mallet to pound the safety pin into place every time I used it.
And yes any hitch should adjust up/down as you need it. This is assuming you don't have any crazy lift on your truck.
Another thing worth keeping in mind is newer truck beds are a few inches taller than older so if you try mating up an older 5th with a newer truck you can run into some trouble. The cutoff seems to be around 2013 or so. I was worried about my 2014 Ram but it slid under my 2016 Keystone 5th with plenty of room to spare. Just keep the old/new truck/5th thing in the back of your mind when shopping.