While I can't give you advice on a motor you definately want to pick up the Castle Link and load the latest firmware into the ESC. I had cogging issues with my Sidewinder 5700 combo and discovered that the ESC firmware was an early revision. They released firmware in August to deal with some issues and it was a marked improvement. It's $25 well spent, you can make adjustments much easier than through the TX while others can be customized only through the link.