Save My Insanity!!

[RC-NUT]

Hey guys. I have a converted Savage X with a KD direct drive gen 2 tranny.

I need to choose a motor and I only want to use 4s. (My other RC's use 2s LiPo and I don't want to buy 3s packs just for this truck)

With that said I'm losing my mind with all of the choices and info I've read.

So far I like:
1. Castle 2650Kv
2. KD Revolver 7L 2450Kv (44 x 65mm can)

Am I on the right path or can you offer some suggestions please.

Thanks!