Best Radar is the Valentine 1. It detects radar/laser/pop and has a indicator where the signal is coming from. It also will cost around $400
I personally bought the Escort Passport 8500 X50. It does EVERYTHING the V1 can do except tell you which direction the signal is coming from. Its radar is...
No need to get fancy. You should have walked up to her and said I have 2 good reasons you should goto prom with me, and then hand her the chocolates or whatever. Then when she asks whats the second reason, tell her you'll "show" her after the dance, lol.
But seriously, be confident, walk up to...