Depends on the robot. Some teams ran Oranges, other Spetrum with no issues. Ellis was using Oranges and he kept having issues, but that is probably because Pulsar was like a Faraday cage :-P

I'd go with something that you can attach a remote aerial to like this - http://www.spektrumrc.com/Products/D...rodID=SPMAR610 , paired with this - http://www.spektrumrc.com/Products/D...ProdID=SPM9645