I've had an Eclipse AVN7000 in my car for about 2 years now and it's amazing. I mention it because it is also a single DIN, HDD based Navigation unit. It does have a built in 7" touch screen though (fold out). The HDD based Navigation units ARE much faster (which translates into being more usable and less of a hassle) than any of the DVD based units I've seen. for the $, I'd probably go with the AVN7000 again.
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I've had an Eclipse AVN7000 in my car for about 2 years now and it's amazing. I mention it because it is also a single DIN, HDD based Navigation unit. It does have a built in 7" touch screen though (fold out). The HDD based Navigation units ARE much faster (which translates into being more usable and less of a hassle) than any of the DVD based units I've seen. for the $, I'd probably go with the AVN7000 again.