I just bought the Passport 8500. Looked at both, and the Valatine is probably a little better. But, I think the 8500 will be what I need and It's $100.00 less. Hope it works. I was "daydreaming" and found my self doing just over 100 on I-10 Last week, Passed a State Tropper, Have no Idea why he didn't give me a ticker or at least stop me. It was around 4:30, maybe he was more interested in getting home.