I have been flying my Phaeton 90 since 1999. I have a 25cc gas weedie engine on it. It's not a fast or quick plane, no matter how you power it. The airfoil is relatively thick, so it's not going anywhere in a hurry. It is a wonderful plane to fly. My servos are just a bit more than standard, around 60-70 ounces and not terribly fast. I'm sure standard servos would be fine, but Hitec 475's are a good economical choice. I am currently in the process of refurbishing, recovering and painting mine, and I will likely put the 475's in with a 5 cell battery, now that I've talked myself into it.
Enjoy your Phaeton, it's a good one.