IEM for gaming is something I really don't think works that well.
I have a Westone UM3.
Very comfy to wear hours at a time.
Sound quality is superb, but bass is... well... lacking.
The only way I can position anything based on sound is when I'm "running".
Basically trying to pinpoint based on the increase and decrease of the sound.though left and right channel as I change position.
Whenever I'm stuck in one area, it is fairly easy to sneak up on my back.
If I stay in an area, I always need to constantly keep check on my surroundings.
I just got a full sized can and a desktop amp to go with it.
Haven't tried it on games to make a comparison though. Having too much fun just listening to music.
The sound quality difference is.... staggering.
Having an open back headphone in a tropical climate is a godsend.
I haven't played ANY game since I got it set up.
Now, I can easily spend the same amount of time just listening to music compared to what I used to spend gaming.