401 Servo
I'm also fairly new to heli's and I have a Caliber 30 on the bench being assembled.
The 401 gyro can be used either with a high speed digital servo or with a "regular" servo BUT there's a switch on the gyro that has to be correctly set for the proper servo. Put it on digital and it will fry your servo. Obviously, the regular (analog) servo will not give you the level of performance that the digital will, but you probably won't notice until you get further along in your skills.
I don't use the 3001 so I can't answer the rest of your question. If they are ball bearing servos, they are probably okay for now. Again, servo quality, especially with CCPM (Or whatever Kyosho calls it), is a case of getting what you pay for. The better servos give better perfromance.
Good luck.
Bob