MMM's on the way, now what Nue to occompany it?

[shizzon]

getting pretty close to the purchase of my motor, and just want to make sure i,m getting what i should. I am looking at : 1515 1y (2200kv), 1515 2D (2050kv) and 1515 2.5 D (1650kv). I am currently leaning towards the 2d as it is somewhere in between. looking to run 4s now and 6s later if/when 4s gets too slow, that,s where i would see the 2.5 as being the better choice, but i dont know if it will perform as well on 4s. also i think the 1y wont like 6s too much, getting high on the rpm's. Just want to make sure that my $250 is gonna get me what i need.