I've been using Hitec digital 5945's in my off and on road cars, and i can vouch that in a 1/8 scale buggy or truck that these servos see much more abuse then if they were in an airplane. The only failuer i've had with them is in a steering servo in my buggy, the middle gear shaft in the servo wore out the hole in the top case half. Other then that out of 8 5945's that has been the only problem in a year.

I'm building a Sig Something Extra atm and feel comfortable putting 5925's on the controls, and a 5245 on the throttle.

In the past i tried JR and Airtronics servo's in my buggy and it ate them up for lunch, mind you this was several years ago. I've never tried Futaba Digitals just because Hitec's price and specs were better.