For the budget racer, look at the Cirrus line of servos. I am running a CS-75 BB MG. it is fast at 0.08 transfer and is priced at a competitive $70 dollars ish. One draw back to this servo. Its case is a little on the large side. For it to comfortably fit in to my TC3 I had to remove the lower screw eyelet closets to the drive shaft. Iíve had the servo for afew years now, never have I had any problems with the servo not centering. This, I think, would be a great servo for just starting out. Hope that all helps.
Team XRay, RCAmerica, Motiv, Gravity RC, Schacht Design Works.
Drive it, Dont slide it!