The Z9 was designed "primarily for the long draw, at to perform best (faster speeds) at the longer draw lengths. This does not mean that it will not perform at shorter lengths, just not at peak performance levels.
I would suggest you try the 2010 EZ7. In my opinion the EZ7 is smoother to draw and sweeter at release than the Z9.
I have shot both bows and own an EZ7- bought I back in April 2010. I have used this bow on South Africa and US bowhunts. I am a happy with my purchase.
If you will look at all the specs of the Z9, its specs are very simular to a Switchback XT, which proved to be a great Mathews bow.