This is a very tough decision. I'd like to say Dodens, because he contributes excellent posts and discussions; but Zeph has been more valuable for me when it comes to music (his tastes are more akin to mine), and he also contributes to lots of the discussions here. So I'm going with Zeph.
This is what I meant when I said these categories are lame. It's the same exact people being nominated for the same exact thing. I'm not knocking on them, just that a variety and originality is for a change couldn't hurt.