Most choose to go overboard on torque. Nowadays, running off-road platforms on high traction surfaces will add to the stress/torture of a servo. A steering bellcrank not having a servo saver built in will need to be taken into account. I'm onboard with a lot of stuff posted earlier about torque, and speed ratings.

Watch out for High Voltage numbers in the specs if you are running a BEC that only puts out 6 volts.

A lot of times a manufacturer will have different tiers of servos. The lower end tier will be, more than likely, a disposable piece of garbage once it dies, or strips gears. I like shopping for the middle tier range/moderately priced stuff for my track bashers. You can find a good balance of speed vs. torque out there. I would take a servo with more torque than a servo with blistering speed. It all depends on where and how a person uses their RC car/truck.

One more thought...Not all gears are made the same. Aluminum, brass, steel, plastic, titanium....take that into consideration when servo shopping. Sure, you can find those low budget all plastic cased servos that have too good to be true specs, but why chance it? When I go looking for a moderately priced servo, I make sure to find one that has spare gear sets available.

When in doubt, go to specific RC platform thread, and ask what servo everyone is using...that in itself can be fun to see all the responses .

That is excellent advice! But I was just looking for a general rule of thumb, just to get the information out on the web so it can be more easily searched.

This day and age, the torque everyone thinks they need is all over the place. You have all these outsourcing brands showing up over the years. Interwebs makes shopping an interesting experience for lowest price/highest quality gear. Paying retail for anything is basically gone. It's so easy for companies to have their name/logo etched, or printed on anything. Big name sponsored drivers are needed to keep the "win on Sunday...sells on Monday" type products going. Competition and pushing the limits...that makes things smaller, better, faster. Right?

Don't mind me. I still have a hard time getting outta bed knowing there are more than 5 brands of servos that are worth anything .

I like Savox, very reliable, and I have rebuilt two of them as well. I am using a Tekin 250 servo on my 8th scale Xray, and it is very accurate. Savox 2274 is a powerhouse for the money.