for planes, you could even get an 8 year old Futaba 7c and fly pretty much any plane out there. Rxs are still made. However, since you are looking to do quads as well you will want to look for stuff that is only a couple years old.
According to Futaba's own receiver wizard, the 7c will bind with the R7006SB, which has both S.Bus 1 and S.Bus 2 support. And if the FC in question is fine with S.Bus 1, there's five seperate choices, four of which are likely much cheaper than an 18 channel monolith.
You can totally use a Futaba 7c to fly a quad.