Beltronics Pro Blue Radar detector
Speeding is only legal if you get caught. No, no, just kidding. This isn't an endorsement of fast-driving. But if you want to pad the speed limit with a safe 10-15 extra mph, consider getting one of these radar detectors. A small investment now will save you the headache from a hefty speeding ticket.
I have no idea how legal these are, but I can tell you (from experience...um...) you do NOT want a speeding ticket killing your cruise mood. While speeding isn't safe, it's nice to know when there's a CHP lurking so you don't get caught by surprise.