Definitely evaluate… I've moved cross country a couple times and abroad once. If you are younger, chances are hiring movers cross country is worth as much if not more than most of your stuff. As you get older though, that completely changes.
There are no real 'cross country moving' companies in the sense that they handle your stuff end to end. Most of them sub out packing and loading, storage/truck hire and unpacking separately so it's a bit of a crapshoot to be honest. Key things will be price and and insurance costs/coverages… make sure that's well in order then the rest is pretty much a commoditized service.