I have been using Futaba 2.4 for years, be aware there are 2 systems, FHSS and FASST, they are not compatible, except with some of the high end transmitters
which work with both systems.
As to other type compatible receivers, i have Corona and Orange
, a lot cheaper than Futaba, they do work, but, as Dodgy said, you might lose some range
, look for the ones that are surface receivers, 'air' receivers depend on height for there range
, also beware of park fly receivers, they are very limited range
, park or indoor.
It all depends how many channels you need to use.
if you need more info give me a shout