And I don't mean a wrap/skin that only there for scratch resistance, I have 3 kids, I need something with at least a little bit of impact resistance. A nice bumper would be fine as well but I've only seen the speck ones sold at the AT&T store.
any TPU case will work with the wireless charger. any bumper case will also since the back of the phone is still exposed.
i currently use this case for my red lumia 920 and it has no problems charging on my wireless charger. it's TPU so if the phone hits the ground it absorbs the impact.