25 series KitchenAid experiences
We have a KitchenAid KUDM25 that we bought in 2000 when we built our house. It is one step above the KUDS25 that you had; it has one more cycle than that one and a heavier sound insulation package but is otherwize the same. While it isn't a "real" KitchenAid ours performed beautifully until early this year when it started to do a poor job cleaning and leaving food particles on everything, etc.
I traced the washing performance problem to the nylon bearings that the lower and upper spray arms ride on. The lower one was so worn out that it came off in two pieces. The lower spray arm became very loose and had nearly stopped turning during the cycle as a result and most of the water probably leaked out of the bearing instead of travelling through the arms and cleaning the dishes. I replaced the upper and lower spray arm bearings and it performs like new again. For less than $40 I saved ours from the scrap heap.
Ours is quieter than the 1996 Kenmore Ultra Wash II (Whirlpool) that we had in our last house. In 2000 Consumer Reports rated the KitchenAid with the better quiet pack as being the quietest model that they tested other than the Bosch if memory serves. Ours seems to be pretty quiet compared to a lot of other dishwashers that I have seen (and used.)
However, I still envy my Aunt and Uncle every time I am down there as they still have their 1990 KitchenAid Superba. I am not sure if that one is all Hobart or if it has a Whirlpool pump, etc, but it still has the chrome trim and handle, heavy build quality, etc. I encourage them to keep it going as long as possible as it is a "real" KitchenAid - at least compared to what is being made now!
Andrew S.