I have got the group price for Yamaha U1 and will try to figure out the group price for Kawai K3. If you are interested in U1 or K3, please send me a message. I will send the info to you.
Please check this link for more info about piano: http://bbs.comefromchina.com/forum5/thread300636.html.
I will call Yamaha dealer to find out what is group price for U1. BTW, could you please tell why you are more interested in Yamaha than Kawai K3? I heard that Yamaha is bright and suitable...