I looked at those. I ended up going with a head unit that has a removeable face plate. My thoughts were that someone would try ripping the dash apart to remove the whole unit and destroy the dash in the process.
I ended up with a single din Sony with a removeable face plate that has both a usb port for an ipod/iphone and a 3.5mm aux port. The nice part is the usb will also charge whatever device you plug into it. Got it from Crutchfield with a install kit/adapter for under $100. The sound is way better than the stock unit and with the faceplate removed, no one is going to try to take it.