Well,

Over here I gotta agree with RCKen, and I apply the rule of economics what is your priority, if you priority, your plane requires the digital servos, do that, what if it's just you want to check how do they work. I'm happy with standard servos. I'm still using FM 72 Mhz TX and RX, simply I can't afford 2.4 GHz, can't even afford now to buy a plane, just got a check today in my ban account and wife made a list of bills and grocery shopping. I believe if things are working good for you, don't switch to something more expensive and stay within your limits. These are my thoughts and I'm not using it as an advice for anybody. Just sharing it

Happy flying

Mody