The Zu is a kickback IMO. It's reminiscent of popular speakers of the 70's. If you like that 'in your face' presentation, then you might also like vintage Cerwin Vega, JBL, Panasonic Thrusters etc...
Albeit the Zu is a jump in quality over the aforementioned brands. Still, you can get pretty close for a fraction of the price of the Zu's. Not sure where you're going to find a grouping of those vintage brands to audition though.