The 3550kv OR motor will spin as big or bigger prop than the 4100kv IR motor as in my experience OR motors have more torque.
The props sizes you have are well suited to either of these motors especailly the OR and can be run on 3S.
I would put the small prop on for 3cells though !!
Fwiw I run a 18" cat with a 3550 OR motor to a 427 with a 60A esc from 3S1600mAh and the motor is hot after a few minutes but the esc and pack are only warm.
My baby rigger runs a 4000kv OR with a 30A esc that thermals after about 2 minutes but is still fun. Must get a 40A esc for it !
I hope this is of some help
See it....find the photos.....sketch it it....build it........with wood
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