I have had a brief go with Dave Powers 13hp Prowler but it was only brief so my judgement can only be based on that.
As long as you not doing massive hose runs, I think the 13hp would be more then adequate.
If you mainly do domestic then no problem I am sure.
And I am sure the new 13hp has gone back to the 2000psi pump so if you need the high pressure then you got it, though I am sure you will loose sustained high heat at that level.
Lifes a compromise at times, and for the money it is good value (as prices go).