Boeing FunJet and Easy Star? Okay ... here we go:

Easy Star ... use a 28mm x 40mm motor from HobbyCity. Something in the 2,000KV-2,200KV range with 3S packs. Prop it with a 5x5 or 6x4. Get a 40A ESC once and for all. Turnigy ones work great. You should be pulling about 25A only. Now you have an issue here, the plane was designed for NiMH but you will probably fly with 25C 3S 2,200 packs. Now a single pack will be ever so slightly tail heavy. If you can, carry some ballast, about 2-3 oz it will make her fly nicely. That should get the CG about right. For me she flies nicer in that manner.

FunJet ... how fast do you want to go? If you are keeping to the same packs then use the following, 28mm x 40mm motor of not more than 3,000 KV ... use a 40A ESC and turn either a 5x5 or 4.75x4.75. You will be drawing about 30+A and that is a nippy set up, not awesomely fast but very nippy. The Mega 16/15/3 is nice and sweet motor to use. I flown my FunJets on 3S, 4S and 6S. My next one, No. 6 I think, will be a simple light set up using 3S 1,500 packs and the Mega 16/15/3 turning a 5x5 prop. She is lovely to fly when light. The fast hot set ups are really lousy in the way it handles due to the higher wing loading. They go fast but I do not enjoy how they handle. With a light or average set up, cruise her around and feel how smooth she is. For a simple set up you can afford to use those Tower Pro 9g servos, it will be sufficient. For fast set ups I use the HS65s.

When building the FunJet, I dock off the turtle deck just behind of the intake. Why? So I can fit the motor in and then have access to double side tape the ESC in place, I don not like it flopping around. Also, try to tape together the connectors from the ESC to the motor, in case of a hard landing, they will not detach. Please ensure its properly insulated, you do not want to tape the connectors then fry your motor when it shorts.