I'm not so concerned about an upgraded audio interface, and I already stream Pandora from my iPhone. I have no idea what the Music Sphere thing will be and am sure that I will NEVER use the Eco feature.
I've only been using the Z110 for about a month, but the one thing I've been praying for from the very first use, is useful, up to date maps.
It boggles my mind that a new flagship model can have such out of date maps. There are times I just have to laugh out loud at how bad the maps are in this system. My neighborhood is newer but has been here for more than 5 years, yet my entire street is missing from the map, and some of the cross streets are either missing entirely or have a few blocks of them missing.
The other day I was driving in South Seattle and turned onto a major street that has been there for easily 50+ years, but as I turned onto the road the map showed that I was no longer driving on a road, there was just nothing there. A few blocks later, the map finally showed me driving on the road again.
The most frustrating part is that I've used a number of nav systems (a couple older Kenwoods, some $150 Garmin units, and a few cell phones) and not had this problem with any of them.
The Z120 upgrades would be nice, but PLEASE GIVE ME MAPS THAT HAVE ALL THE STREETS ON THEM!!!
The nav portion is a major disappointment on an otherwise very nice system.