EzDrummer sounds excellent, and usually with little or no tweaking. I own EZD + several additional kits, Superior Drummer + a couple of add-ons, BFD Eco, Session Drummer, Addictive Drums, Battery 4 and 2 N.I. Studio Drummer Kits.
For the money I've spent on drum VI's I could have taken wife on a very nice vacation. But when it comes down to it which do I really use? It's almost always Ez or Superior Drummer.
That said, I think Addictive Drums sounds great, is easy to use and has good expansion capabilities. It's certainly plenty enough to add high quality drum tracks to your song without feeling the need to make excuses about the sound. IMHO it's easily the most useful 3rd party plugin offered in Sonar X3.