The Myka is the women's version of the Rockhopper. Probably not what you're looking for.

The Chase looks a little more DJ oriented. I'm sure you *could* ride it on trails, but it wouldn't be my first choice.

The Hardrock will be great for trail riding, and they're supposed to be fairly burly bikes that will put up with some punishment. I liked the look of the older design better...it looked more durable, and the new design's top tube looks like it would decrease standover, but I've ridden neither, so take that for what it's worth.

Assuming it fit me, I'd go Komodo. The geometry looks pretty good for jumping, but if chelboed is any indication, it works fine for trail riding too.

Something else to possibly think about...you looking for freeriding or jumping? Freeride bikes often have a good amount of travel, while jumping bikes do not. For example, the Chase has 80mm, and the Komodo has 130mm.