The pricing I've heard for the following...
Cab1L / Base 1L set current MSRP is $249.99 will be $299.99 MSRP +$50
Legacy Powermaster current MSRP is $99.99 will be $209.99 MSRP +$110
Powerhouse 180 current MSRP is $149.99 will be $209.99 MSRP +$60
GW180 current MSRP is $279.99 will be $329.99 MSRP +$50
So it really doesn't surprise me that the Z4K is increasing but what does surprise me is they are not honoring previous pre-orders.