Actually not more upscale than yours
Then you wouldn't have been too happy with the machine featured in this thread; I lost interest when I noticed that there was no Rinse-Glo feature. This model is actually one small strange peg below ours even though it has a BB top.
For what it's worth, we owned many dishwashers (purchased new)with plastisol-lined tanks and never had even a spot of rust coming through. I'm wondering if this is a problem that originates with a careless user. I have two machines in my collection that have plastisol tubs, one a Mobile Maid and one a Maytag, that came with some broken blisters but with careful applications of metal tape and vinyl patching, they haven't spread. I think once the lining is breached, it's just a matter of time. I do think that the all-plastic tubs were an improvement, of course.