I think the VicoVation Marcus 5 is best dual camera set, is expensive but two cameras are Full HD with WDR, this camera is also compatible with 128GB memory cards...
LDWS - Lane Departure Warning System (activated by GPS mouse),
FCWS - Forward Collision Warning System (activated by GPS mouse),
http://www.ebay.co.uk/itm/VICOVATION...item461e86dad5