I voted yes... simply on the fact of the electronics and that you have not given up on QED. I have realized that so many people want to the particle theory (one of my profs says that they sort applications by particle theory and everybody else) and experiment that you need to understand at least some advanced QM.
WARNING: This is my opinion. I have seen grad students with no clue just wanted to do HEP and failing at grasping some of the fundamentals, like QFT or QED. I am have the utmost respect for people, who try it. I know I can't cause I prefer working hands on with things and am not the guy that does Monte Carlo for a living. I just see people trying and then after their 3rd year decide... This is too much screw it. I have worked on non-accelerator HEP (as awkward as it sounds) last summer in a pure research institute and talked to the theory and experimental grad students.
Most people, from what I can tell, fail at realizing what QFT, QED and QCD really imply. There is this dream of string theory, QG, etc. and you get down to QFT and people literally go WTF is this, I didn't sign up for this ***. I have seen grad students switching fields simply cause of QFT (string theory to condensed matter or plasma theory).
HEP experiment on the other hand requires at least some sort of electronics background. You need your pre-amps, you need to know your silicon, germanium, (insert semi-conductor here) for this stuff to work, there is no way around it. It will give you boost on the app. I am just warning you now HEP is not for everyone. There is always the hurtle of possible simulation work, which can eat up 2/3 of your time. On a purely instrumental basis I would say you are prepared. On general, I have to agree with other people that more information is necessary or that you are aware of these things.