HK by far. The Target Finder barely provides any advantage at the end of the day, unless someone is headglitching or sitting in a dark corner, in which case nobody likes you and you deserve to be shot.
Me and my uncle went ridin' down, South Colorado, West Texas bound BO2 Combat Record - http://tinyurl.com/cxvk9xr
I don't see the problem with target finder. The vast majority of the time, they will have seen you anyway. I started running Blind Eye on every class because I grew tired of dying to Hunter Killer drones. It's even more infuriating when I die to one now.