Looking into a new head unit

[bigtoepfer 0]

Recently got a new car and i'm going to have this one for a long time. So i'm looking for a nice headunit. I've been looking into the double din types e.g. the pioneer D3, or Z2. Or the panasonic Strada. or whatever.

I'm leaning more towards the pioneers because i can get them for cheap. Or possibly a JVC only problem is the jvc doesn't have navigation like the rest. Any suggestions guys??