they're fine

For gaming they'll be fine and I doubt you'll notice any difference :P

in-ears always made my head hurt after a few hours
let us know how it goes!
make sure you check out the adjustable tips, so you get a good fit and good seal

Used to play quite a bit with my creative EP630. Sure they offer lots of volume but all the earphones i've tried so far doesn't reproduce explosions, gunfires anywhere near my sennheiser HD555s. In fact, i find earphones too "bright" and it hurts after u hear one too many explosions.

Also, soundstaging is flattened if hearing footsteps is important for you.

Play with a headphone.

what is the fucking point of 28khz? you are served with 18.5khz for playing QL

I once paid 150 euros for etymotic in-ears, which still lay on the shelf ever since. My plan was to use them for gaming and music on the way. Well, my experience was that they're uncomfortable and you cant get them out of your ears quickly. That last part is of importance when you're on the way, since you dont hear a damn thing with those.

Good stuff about in-ears: great noise cancelling for when you're on LAN, great soundstage, and superb detail. Well, thats at least why I bought them.

Too bad you wont be selling that stuff second hand, so be sure if you buy those.

I'm still using Sennheiser HD595 today, but its been years since I've been active in e-sports.

btw: check if those in-ears you use now, also go that far into your ears as the shures. My guess is that the shures might get further into the ears, and that way, have a higher risc of being uncomfortable. Thats why custom-made pieces are the real deal with in-ears.