Just food for thought: I have a Stampede as my all-around basher truck. Until I went brushless, the stock traxxas TQ AM radio worked perfectly, I never noted a glitch. In my planes, FM works fine with brushless systems, though I am slowly switching over to Spektrum since others are on my channel at the club flying field now. Back to the Stampede - when I put the Sidewinder in it, the Traxxas AM setup became unusable at anything more than 25' away. I even moved the receiver as far from the ESC as it would go. So, I put in an FM system I had lying around. This works much better, though some glitching still occurs when it's more than 75-100' away and I'm on the throttle. So, I put a Futaba FASST 2.4ghz receiver in it - presto, no more glitching.

That was my really long story illustrating why you ought to consider 2.4ghz if you plan on upgrading to brushless.