I had to replace two of my savage servos (sb-5 and sf-20w) with 2 sf-5. I'd like to know if the sf-5s are worth it or should I return them and get something else
Your best bang for the buck will be get a good steering servo. Check out something lile the ProTek 100T. You'll get 216/.14 and it is less than $50.00. I'd not worry about throttle servo unless you plan to race it. If you get a new throttle. then you'd have to get a pretty good one to see any tangible difference.
+1 on the Protek 100T servo.. The Protek 100ss would be a good choice for throttle..
On my XL I use savox 1256tg for steering.. Savox 1258tg throttle...