RE: Servo comparison S3004 vs. S3001
You have to really stay on top of things to keep up with Tower's pricing games and their coupon codes to know how they work.
In case you are looking at Hitec receivers, the 8 channel is cheaper than the 6 channel and with Hitec there is no high band - low band games. The same reciever works all across the whole band. Don't forget, you are going to need a Hitec dual conversion crystal to go with a Supreme 8 channel receiver