Opinions on your in dash GPS units

Hey guys,

I want to get a double din in-dash GPS unit.

Which one do you have?
What do you like about it?
What dont you like about it?
Which one looks good?

My concerns:
Updating maps, I drive a lot and need to be able to update my maps regularly. From what I know if its dvd based you have to BUY a new dvd from manufacturer every year to update maps. I heard Eclipse has a USB port where you can just upload new maps for free directly to the unit. How slow are DVD based units compared to the Eclipse Hard Drive based unit.

Also, Ease of use. I dont want it to be hard to use or I wont use it and just switch to my phone for GPS.

Sound Quality is also important as I will have a complete high end system attached to this.

Thanks