The "revised" documents are fan made, sometimes incomplete and sometimes a little outrageous. A few kinks need to be ironed out. Just letting you know. The Klan rulez however are, well, "semi-official". That is, they were made by the HA, with some community feedback, but have not been ratified by SG and also have a few kinks that need to be ironed out. Current official rules are those in BBB (Big Blue Book) and Armada.
All that out of the way, I don't have a lot of experience with Orks and so have not given them much thought. The revised documents were originally meant to balance ship costs, internally within a given list and externally to make all races viable, as well as amend some ship profiles to be more consistent with the models (such as the Despoiler) or its class (such as the Retribution). As such your choice of ship should be, more than ever, a personal decision. So just about any ship should be usable. Some new ship classes and rule changes also got slipped into these documents that I am personally not a fan of, and which I think goes just a little beyond the original mandate.
On the other hand, the "official" versions don't ever seem to have balanced ship profiles, or even sensible ones sometimes, or well thought out fleet composition restrictions, but they do seem to be reasonably characteristic. I mention this with the Ork Klan rulez specifically in mind. So if I were you I'd use those Klan, upgrade and character rules rather than the ones from the revised document. You could use ships from the revised document.
If you were to do this I'd aim at creating a ramming and boarding based fleet, and choose ships and upgrades accordingly. Otherwise I don't have much in the way of advice.
