Corporate moves are usually paid for by the company, which changes the equation. I would not pay for movers myself.
When I moved from California to Dallas (1990), I was fully-prepared to rent a truck, hire a crew to load it, and drive across the desert myself. When I looked at the logistics of getting two automobiles to Texas at the same time without towing (which I dreaded), as well as the fact that the truck rental people could not promise me an air-conditioned truck (and we saw 122° in Phoenix on our way), I decided to get a quote from a moving company.
To my amazement, using the professional movers cost considerably less than just renting the truck, and that was before the cost of gasoline!
So much has to do with the direction the market as a whole is moving; at that time, lots of people were moving to California, so there was lots of available capacity eastbound. It varies.
Whatever you do, be sure to use a national company, which is more likely to have decent crews lined up for loading and unloading, and in addition, to stand behind getting things taken care of if and when damage occurs.
When we moved from Houston to California, the move was hired done by a relocation company, and it was one of the national Van lines (I can't remember which one, now), and when the moving van showed up, the driver's "crew chief" supervise the load, while the driver slept in the sleep-aboard cab. When the truck pulled up to the house in California, the "crew chief" was nowhere to be found, and the driver said, "oh, he was just a hitchhiker." The scale of damage to our furniture was epic; but, to their credit, the moving company took care of all of it, to our complete satisfaction (the driver tried to buy us off with cash as the first few pieces came off, but when we saw the scale, we would not accept it).
When we moved from California to Dallas, we were spending our own money, used United, and the driver was an old hand. He supervised the loading with extreme professionalism, and everything arrived in perfect order. He also supervised the unloading. We were very impressed.
