Yes, there are some toy grade stuff out there. I have zero experience with them. Since modern electronics are virtually built proof ( I’ve been flying the same two transmitters for 9 years ) I suggest going with the EX8. For the airplanes that you have, any of their full range 6 channel receivers will work just fine. Just beware, there are counterfeit Spektrum receivers out there so make sure you buy from a Horizon hobby authorized dealer. The really cool thing about Spektrum is that you can get their bind and fly airplanes. Some of those are pretty cool and the small UMX models come with stabilization. Looks like you have a nice collection to keep you busy.