@Rolex Up at the top of my stickied thread about servos I said that
"For the total beginners out there just know that on a nitro rig you will need either 2 or 3 servos (1 throttle and 1 or 2 steering depending on the kit)."
It actually should probably read 2-4 servos because I forgot about the...
Id look at Savox Servos. If a 45mm tall servo will fit in the tmaxx they have one that is 500oz/in for something like $75-$80. If you need more of a standard height servo (38ish mm) then they have a few different possibilities, you'll just have to look around and see what works for ya :)
For the total beginners out there just know that on a nitro rig you will need either 2 or 4 servos (1 throttle, 1 or 2 steering and 1 for reverse depending on the kit). For electrics you generally one need 1 or 2 for steering depending on the rig.
Your standard servo for a 1/10 or 1/8 scale RC...