Lengthy response alert!!!
I’ve been using in ears for about 5/6 years now and wouldn‘t go back but it’s a rabbit hole, so items of note:
- The do slightly detach you from the audience, I say slightly because if you have enough mics running, including a drum overhead then you general still hear the noise from the crowd which leads me to my second point;
- You need to mic up most of your band, at the bare minimum I mic guitar, DI bass and put a kick and an overhead on the kit, even if I don’t end up putting the overhead in the foh mix, I still use it for my monitor mix to help with timing and it does pick up crowd noise
- If you’re micing your cab and you’ve never heard that before you might be surprised, what you’re hearing in iems is mostly speaker and you might find that you don’t like the sound of your speaker with no room interaction, mic placement helps a lot here and playing around with mic positioning works wonders
- To me controlling your own mix is paramount. Get a digital desk and using iPads/tablets to do your own mix, gives you control
- Don‘t go cheap on the ear buds. Yes, a good wireless unit makes a difference to the sound quality but the ear buds have a big influence, especially when it comes to sound stage and bass reproduction
- If you can get a unit that does stereo, even if you never pan it gives a bigger sense of space
if you’re looking for equipment recommendations I’d look at Sennheiser wireless, their g3 is an old model but still good and reliable. As far as headphones look at 64 Audio or JH Audio.