I don't think you need to worry about getting the newer version of the kit, I ordered from Tower and got the new version and from what I have heard the new kit has been out a few years. The easiest way to tell is the new version is almost all laser cut. A Saito 125 will be awesome I got a 120 because I was too anxious to wait for the 125 to come out in December which was about a month ago now, but I really like the 120 anyways. You probably want around a 15x6 prop, check the 125 manual. I can't see anyone wanting this plane for speed so go with a large diameter low pitch prop for thrust not speed. Some like PCM some don't, PCM will kill your throttle and maybe save some damage and buy you some time if there is an external cause of the signal interruption, but when it's in failsafe you have NO control. I would prefer to fight it till the end with PPM rather than watch my plane autopilot into the ground. Those servos sound good to me...too much torque if anything. A 1500 battery sounds good just make sure to get nickel to save the weight vs. nicad and 6 volts won't hurt except for slight added weight. I'm using S3004 elevator/aileron/throttle in mine dual aileron dual elevator and an extra S3305 I have for rudder. I use only Sullivan tailwheels and I'm trying the included cowl to see how it does before spending more $ on glass. I don't use wheel pants, no benefits IMO. I'm going with a generic .60 size aluminum gear rather than the wire gear.