Im leaning slowly toward a 2.4 system. Im stuck between the React, Mx3 or 3PM right now. Ive heard of the 2.4 having less range w/ brushless cars than some AM or FM systems, but who knows how accurate that statement is.. As long as I have enough range for a nice full speed run, Ill be happy.
If you are going with 2.4 I would suggest the futaba. It has more features than the airtroniks, feels better IMO, and is not cheaply made like the react. I was going to buy a react and go hold of one. They feel really cheap and plasticy. and it does not have a battery try either, just a 4 cell stick pack floating around in the base. The react has a ton of great features, I just wonder how long it will last.