Car and Driver just published their comparison test of the Escort Passport verses the Valentine One. Check it out here: ESCORT PASSPORT MAX VS. VALENTINE ONE
I've always been a fan of the Escort line of detectors and their latest version, the Passport Max, has received some really good reviews. If I was currently in the market for a new radar detector, it would be on the top of the list.
Along with a good radar detector, Escort also offers a phone app which connects directly with your detector to report any confirmed radar hits or police sightings. All of your reports and other users reports are shown on a map with selectable warnings when you approach one of the reported items. It's a great system, the only draw back is the issues with the software working on certain phones and the lack of other users in some areas. The more users providing accurate reports, the better the system works.