go with a zumo 550, i was surfing the forums and had to join this one http://www.motorcycle-journal.com/
because there is a vender that is giving 10% discount to members in todays economy ill take a discount. i ordered rain gear but he deals with zumo and a discount what do you have to loose (http://www.motorcycle-journal.com/fo...-n-cycle-gear/)

 

My Smartphone is GPS enabled but I seldom use it.
Good to have if you need it though