I think the Anthem has the same needle/tip as the single action 200, so you should be able to get finer than 1/4", even with those ridiculous gravity feed color cups. It should be just a matter of tweaking the paint/thinner mix, air-pressure, needle postion, and the distance from the paint surface until you hit on the right combination of variables to give you the results for which you are looking. Practice, practice, practice.
About the color cups, I really dislike the Badger color cups for gravity feed airbrushes. It seems as though the thing is always at an awkward angle, it has no lid so I am always worried about dumping a load of paint onto my model, and the thing puts that paint about as far below the airbrush body as is possible. It almost seems as through the design was predicated on manufacturing ease rather than functional utility. My Aztek, on the other hand, had a really nice little side feed color cup. You could adjust the angle to keep it level, and it had a nice lid to keep paint from spilling. All in all, I really liked my Aztek's side feed color cup a lot better and wondered if there was a way of somehow adapting the Aztek one.
What I did was to make a little elbow that would fit into the Badger body's siphon pickup, and kick out to the side and allow the Aztek color cup to fit into it. It wasn't real complicated. I picked up a piece of 3/16" x 0.03" wall aluminum tubing from my local hobby shop. I used a propane torch to heat it for a nice 90 degree bend. (Actually, I went a few degrees shy of 90.) I used sandpaper to grind a slight taper on the end that fits into the airbrush body. This took a bit of time to do it carefully enough to keep it perfectly round so that it would fit without leaks. I then used a round jeweler's file and some sandpaper to enlarge the hole so that the Aztek color cup can snuggly fit. Since the Aztek cup is somewhat pliable plastic, I didn't have to be as futzy to get a leak-free fit.
With this arrangement, the paint is a lot higher thus needing less suction to lift it into the body which in turn allows spraying at noticably lower pressures. I'm not exactly sure how low of pressure that my sidefeed adapter will paint at, but it is somewhere below my gauge's minimum threshhold reading of about 10 PSI.