$14000 seems a lot for an evap system. How big and how many outlets were you quoted for? My evap which is a Brivis Contour L34 to 5 outlets cost $3500 2 years ago.
Also I wouldn't say JB1's comments are entirely true. Whilst they may think your better with refrigerated, do you really want to be living in a sealed environment for the whole of summer or have a few days where evap doesn't work as well? Then there is the cost of installation, cost of running to consider which is more with refrigerative.
As I have been saying evap is designed to knock the edge off the heat not cool like a refigerator. If you have that in mind you can work the rest out, as at the end of the day it is all personal preference. So balance up the pro's and cons of each and decide for yourself.