One thing to bear in mind with these is the storage space you have.
In my original post I mentioned borrowing one from a mate. I think his is a fairly old Karcher K3.
When I bought mine, I thought they had give me the wrong box, as it was so small. And once it was assembled, it is indeed much smaller than my mates K3.
It takes up so much less space in the garage than his one did & if I want to move it, it is so light to shove from one place to another. His one is no doubt more robust, but it weighs a bloody ton & takes up a lot of space.
Finally – just choose one & get it bought – I did exactly the same thing going round in circles looking at every option, examining the stats & being frozen with indecision
In the end, the lack of availability meant that my hand was forced to an extent & to be honest it was quite a relief to have the choice taken away from me!