Seriously, though, there's also the suit Bruce used in Batman Beyond too that was a sort of power suit. So you could totally be both. I would figure you'd want to have the "base" class be something that would fit that, though. Even if you're in powered armor, you'll kinda need to know how to swing a sword somewhat unless it's swinging it FOR you.
Anyway, I think I mentioned enough times how I'm using DRK with Judge. I'm just doing it for the sword, to be the Judge Blade for the Judgemaster. What is rather amusing is the fact that he's technically a bit of a black knight himself - an interioris hominid, as Black Hat mentioned - even if he isn't playing strictly as a Dark Knight. Not to mention he seeks to bring a sense of order and "proper"-ness, not unlike what it seems the DRKs would be doing in Ishgard.