Glad your liking it and glad its a big step up from stock. I had the Kenwood DNX6190 and as much I liked the NAV included the sound was very flat, the UI was very poorly setup and it was very slow and sluggish loading between screens. HD radio was a big selling point for me, as I listen to a lot of local radio and of course I got the Sirius module as well. Might get the NAV later on down the road but for now I like my phones Google maps. Are you using an iPhone or android phone with the X5500BHS?