Too bad you want to go topless because like Tony said, that is a nice top and even nicer overhead setup. Not to mention that you will need to accommodate for noise while listening to your empeg while driving without a top.

You mentioned you do not want to cut any metal so the dash is completely out of the question and under the dash might prove difficult to operate and/or reach the empeg.

If you don't mind not being able to see the emgeg display in front of you but able to easily reach the buttons, why not mount it on the center console. It certainly looks big enough.
Your empeg would be facing the dash but can be easily controlled while your arm rests on the console. Besides, being that it's an after market console, if you mess up or decide you do not like, it you can always get another console.