Originally Posted by
xelferwols
1) How do you know what size servo to get in terms of dimensions?
Standard size or low-profile standard size.
Originally Posted by
xelferwols
2) Why would you choose a standard size over a low-profile and vice-versa?
You would choose a low profile for a couple reasons. Maybe you want a lighter servo to reduce weight. Alternatively maybe you want to make room to move all the electronic (ESC and RX) more forward to shift weight on the chassis. Or maybe you just want more room for the electronics mounting period.
Originally Posted by
xelferwols
3) Why would you choose a high-torque over a high-speed and vice-versa?
You have a buggy, high torque is overkill. More for trucks, 1/8, etc.
Originally Posted by
xelferwols
4) Why aren't there any in-between (medium-torque medium-speed) version of servos (that I've seen anyway)?
Because pretty much everyone is hung up on highest torque and/or fastest speed. So that is what sells, they would make a servo that would be perceived as less performing and thus sell poorly.
Originally Posted by
xelferwols
5) What are the long-established high-quality brands of servos?
Futaba, KO Propo, Sanwa/Airtronics have all been doing it for decades and you can't go wrong with any. They are also typically the most expensive, and there are now lots of lower cost options which are more than decent. ProTek, Savox, etc. MKS and Xpert are other reliable options.