ok, I tried both games, found demos on the web. while Act of War seems like a Command & Conquer knock-off (seriosly, it has a static camera, stupid health bars above the units, low resolution, and I think live action cut-scenes, too, and overall looks exactly like a C&C game), World in Conflict really made a good impression on me. it feels like CoH, and I remember Ground Control games being very good. I think I'll give WiC a try once I find the full game.
anyway, any other suggestions? real time tactical or strategy modern warfare games? preferably something from 2000's