Hydroforce Nautilus Extreme 500 PSI , are they worth buying?

I'm wanting to buy the Nautilus Extreme 500 psi with APO next week and don't know much about portys.
I do know that I want the big vac motors, but are they as powerful as they claim? Not too concerned with heat.
I used a friends Edic a few weeks ago to clean a 2 houseboats and although it got the job done, it just seemed too wet when I was done.
Any information or experiences with this porty would really help. Thanks.