Valentine 1 has been a consistent front runner for years.... HOWEVER, it doesn't not have a good filter for lane change alerting and active cruise control systems yet... Which is a big problem considering uptrim camaros have this feature running all the time themselves.....
There's a really good YouTube channel called " Radar Vortex" that does good reviews and talks about this...
http://youtu.be/4DiU2A4c2s4
http://youtu.be/DGuTgWtnbNA