I'm using the older TX/RX set. P/N - SPM1000 for the TX and SR3000+SR3001 RXs. I got mine used, so I don't have much invested in the system, maybe 80 for the radio and 90 for the 2.4 combo, 170 total. If you don't have many cars the cost to go 2.4 is acceptable in my opinion. I don't know anything about the telem stuff and have only seen people with it on Spektrum radios. For my more expensive cars I run a 3PK/FASST setup.