i came across a web sitehttp://www.rcheliwiki.com/2%2C4GHz
what do you guy's think is the best system to get
A number of manufacturer's have produced radio equipment that uses the 2.4GHz band.
Futaba has FASST.
Spektrum has DSM (now superseded by DSM2).
JR usually use Spektrum's DSM2 system, but they have their own DSMJ system for use only in Japan.
broadly, 2.4GHz equipment works in one of two ways.
The transmitter can find one or more 'empty' channels and broadcast on those until the transmitter is reset. The receiver will scan all frequencies at startup for its paired transmitter, and then listen on only those broadcast frequencies.
The transmitter can skip 'randomly' from one channel to another, only remaining on each channel for a fraction of a second. Once the receiver detects a transmission from it's paired transmitter, it can guess which channel the transmitter will jump to next and so maintain the radio link. This is known as 'Frequency Hopping Spread Spectrum' (FHSS).
The allowed power output for the first method is often much lower than the power output for the second method. While Futaba's FASST is a true FHSS system, Spektrum's DSM is a 'Direct Sequence Spread Spectrum' (DSSS) system, which switches rapidly between only two frequencies; in Japan this was not considered sufficiently 'spread' to qualify for the higher (100mW) power output and would have been limited to only 10mW. This prompted JR to develop the FHSS DSMJ protocol. Some rumors suggest there may be some discussion within the EU about whether any new licenses for DSSS systems will be granted for the higher output power (currently granted licenses should continue to be valid, however).