Jammin X-1 CRT motor selection

I could get a more expensive motor now, I just do not want to regret it when the monster max comes out. I am limited to 4s with my current esc, and I do not want to buy a new esc until the MMM comes out.

I was under the impression that the motors are closely linked with the input voltage, therefore the motor I'm running now may not be the best option when I switch to 6s, that is why I wanted to go cheap now and go all out when I can move up to 6s.

I do appreciate everyone's help and this seems to be a great forum. I did not mean to come off as abrasive if that comment was directed towards me.