The last I bought was a single gun SKB that's about 49" long and I think I bought it for just over $100.
The foam is one piece of convoluted in the lid with another piece of convoluted glued on top of a piece of white styrofoam in the base.
I'm getting rid of the foam in the base to replace it with Kaizen and do a custom cutout when my gun is ready for it.
The case itself has nice latches and an O-ring seal. No wheels but it's sturdy.
If your rifle will fit that, I don't see many reasons to spend more (wheels would be one) but I see many reasons not to spend less. Cheaper cases feel cheap by comparison. I wouldn't trust the latches, hardware or waterproofing of the cheaper cases I have seen.
Maybe some China cases are ok but it's taking a chance if you don't know exactly what you are going to get.