I think you have good reason to have doubts about the 2.4 systems! Check out this thread before go out and buy a 2.4 system. I am looking at new computer radios myself and have decided to go with a snthezied 72 mhz system. It can be converted to 2.4 down the road if I want by by plugging in a module into the Tx. [8D]
http://www.rcuniverse.com/forum/m_6405339/tm.htm