I'm currently undecided between the above units. I live in NJ where we don't have a lot of red light cams and no speed cams. Although I would use the unit for everyday driving, the main purpose would be occasional trips to Hartford Ct. The RX is $240 and the GX is $280. Any opinions on whether the RX would suit my needs, or if I should go with the GX? I was also looking at the Sti ($400), but I don't need the Stealth, so I figured that was just wasting money.