I've always loved the way the Antec 300 looks, I don't tend to like LED fans and flashy doo-dahs.
As for the Z11 - looks like it comes with 5 fans - 120mm in the top, front and rear, and 2 80mms in the side. Incidentally, side panel fans are almost always a bad idea, and 80mm fans have no place in modern computers. I'm not a fan (no pun intended) of most Zalman cases, in fact any semi-modern Zalman case, as the ones I've had the misfortune of building in were awful - very cheaply built. I haven't tried the Z11-Plus personally, so perhaps it's better, although if it was my build I would pick the Antec every single time.