We bit the bullet this past weekend and bought a new dishwasher. The old one was leaving more gunk on the dishes than it was taking off. I tried cleaning the filters I could get to, but I was afraid to start taking pieces apart for fear of never getting them back together. It was pretty disgusting.
We searched consumer reports and dishwashers by Bosch were all at the very top of the list, so that is what we chose. It is nothing fancy, but the interior seems to be almost seamless compared to the old one (which had four different filter/ grated areas in which food particles were building up) with just one, easily removable filter in the bottom. The other plus is that the new dishwasher is much quieter than the old. So far we have run it a few times and everything is working out well.