Why is it your "flagship" unit can't have the best software you have available?? I have two z2's. Both have Bluetooth echos and the voice recognition is shakey. But I had a need for a 3rd radio and instead of a navigation unit, I went with something else. I only wanted XM and Bluetooth for this vehicle. So I bought a Pioneer FH-P8000BT. It also has USB for my flash drive...and all for under $300. It's a real nice radio. But get this...there are three stages of echo cancellation in the software to choose from. I used the middle one and there is ABSOLUTELY NO ECHO at any time! Furthermore, through the Bluetooth, it utilizes the Voice Recognition in my phone software. (LG phone) It has NEVER, EVER misses a command. Even with the a/c blowing full blast at 80 mph down the road. It never misses. Best damn Bluetooth and Voice Recognition combination I've ever seen. I have had several folks tell me the sound quality is much better than my factory Acura MDX...and that's saying something.
So Pioneer...what the hell??? If you can give us that in a $300 radio, why not the top of the line Z series???