The car stereo I use has automatic bluetooth connection. Whenever I switch my car on it connects automatically. I'm also able to skip to the next/previous song and pause and play with the stereo.

As for navigation modrana is alot faster then sygic, but doens't have the looks. Sygic works just fine for me and fast enough. You could just reflash the device and only install modrana. Or overclock it a bit too 900MHZ if you think it's still too slow.