You say when you speed you keep someone behind you?
I've always been a believer in keeping somone just in view, far far in front of me. Somone that you know is speeding like a
MF. Then if you see any bacon swing out, stand on the brakes.
I also have a 14 Band Radar / Laser detechtor which was like 150 bucks... but I still really don't trust it.