How much do you like the way the Panasonic operates? Shoot - it could be a blessing in disguise - get someone in your ride yacking away about something you don't wanna hear about just crank it up and then stuff the remote in your lap! They won't be able to turn it back down //content.invisioncic.com/y282845/emoticons/thumbsup.gif.3287b36ca96645a13a43aff531f37f02.gif
Seemingly there are alot of complaints about the longevity of Panasonic's head units....but if that is the only problem with it and you like it okay otherwise I'd say just save your money and stick with it for now...
On the flipside of that it may be the perfect excuse to get you an 860 which is a much better unit than the Panasonic you're currently running.
I reckon it's all about your personal financial situation at the end of the day and no one can make that decision but you. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif