To those who run it biamp: I'm cab hunting for this head right now and wondering what the ideal hi frequency cab would be. What do you guys use? Any crossover setting advice while we're at it? I know from what I've read online that most 800RB users run theirs full range which sounds great, but I intend on using mine to it's fullest potential. Also for biamp & non-biampers alike, how's the DI on this head, just in case I find myself in a situation without a DI box? It's unlikely, but I never rule anything out.