Totally feel you. We essentially bought a house (rented a small one with a tiny galley kitchen before that) so we could fit a dishwasher.
Here's the story of how I found the perfect dishwasher, and paid just over half price for it. Enjoy.
Several friends had told me that the one to get was a Miele, I googled it and that seemed like legit advice. But Miele make a lot of dishwashers. I did the quiz on their website, the things that were important to me were that it's quiet as the downstairs is open plan, that it had a short cycle for when you're having a party and need to do a load of glasses and such, and that it had that cutlery tray at the top rather than a basket.
Turned out there was only one model that did all three! And it was sold out or unavailable everywhere except in John Lewis. I think it was probably being discontinued.
Anyway, I had a day off because it was my birthday, so went into town to JL. I don't remember now why I couldn't order it online, there was some reason for this (isn't this a great story???). Went in there, looked for it, found the display model, did my measurements and talked to the sales people because I had some questions. Then the shock: They didn't have any left!!! Whaaaaaat.
So I asked about the display model, which had a little dent on the inside. They were a bit reluctant, I don't recall why, I do remember finding it a bit odd at the time. They needed to make some calls to see if they could sell it. Eventually, they decided they could sell it, deliver it and install it. Also said the warranty would be the same (this warranty never materialised btw., but whatever).
And this is how I ended up buying the perfect dishwasher, at 40% off, on my birthday.
It is literally the best thing we have in this house, it's remove one of the biggest sources of conflict in our relationship. I cook dinner, my partner puts everything in the dishwasher, he empties it, I make it dirty again... Perfect harmony.