To be honest as has been said if you want cable free its gotta be wireless, the IR triggers are utterly useless piles of uselessness I've either used or handled almost every time of shutter trigger going and the ones I've seen and had the most trouble with is the IR triggers communication with them is nearly always an issue and they just don't work well...the only use a IR has is for self/family portraits where the person firing the camera is also in front of the camera in the line up
So if you want wireless the one I own and think is very impressive is the Hanel Giga T Pro 2 its not the cheapest but its functional, reliable and well made
The key question is though what situations are you looking to use the tigger for?