Got your attention!
Once you drive with a Digital servo you will never go back.
1/10 scale go for High Speed, .10 @ 60 or faster.
1/8 scale buggy/truck go for High Torque 90+ oz/in torque.
1/8 scale on-road High speed is better, .13 @ 60 or faster.
With a Digital High Speed servo used on a on-road car. You can turn the wheel at the very last second before entering a corner instead of 2 feet before.
With a Digital High Torque servo, The wheels on your Buggy/truck will go and stay EXACTLY where you tell them to.
It really is a tremendous difference when compared to "Standard" type servos.
Buy what ever brand you like best, they're ALL good. If your worried, get one with good warranty.