I don`t know the size of your Cub, there are so many Cubs out there...
But if it is a 2-meter as Norm said I agree a .60 equivalent setup is a bit of overkill. But myself I would have used a setup in the .50-range aiming for capability of 1000 - 1200Watt at WOT. Which isn`t needed at all, but every part are running cold. In addition you get good flighttime!

This mean: a good outrunner, kV in the 450-550 range and 5S5000 LiPo-batteries. An ESC at least 60A. Then choose a propeller which only give a max load of 800 Watt for the first flights, I would guess this is more than enough. Then your setup could be wild or steady by just choosing an other propeller.

I don`t know Rimfire motors, but have read some bad things on them. I prefer high-end motors, but I am demanding
When it comes to batteries and ESC I have had good luck with some cheapies. Turnigy ESCs from Hobbycity, and the new Zippy Flightmax LiPoes are working OK and are extreme cheap! Buy yourself 2 Zippy 5S5000 and you would propably get 2 flights of 20-25 minutes each at the field. A 2-meter Cub won`t care of the weight of the batteries.