Motor Choices for Slash

[mambarustler]

Hey guys well I wan to convert my rustler vxl roller into a slash later n when i get some cash, but I need to decide on a motor. I am going to be using a mamba max esc on 3s lipo. I was thinking about a vxl motor but not shure. I will be using a fan/heatsink on the motor I use. I want to stick with 1/8" shaft because i dont want to buy 5mm for this. LMK what you guys think is good motor that wont be giving me heat issues with my setup.