As some may know on this site I am a staunch user of Tiger Motors. Out of all the motors I have used on my copters these have offered the best quality and performance for the money. They have just released some images on their site of a new line called the Navigator series. These motors look like they are for "real" heavy lift applications. These motors look very promising with their various prop mount configurations.
Their MT series motors have worked great for me with the APM line, and unless something better comes along I will continue using them. Specs are supposed to be released this coming week.
If anyone is looking for some high quality replacement motors for their drones let me know. I have an extra ten MT4006/740kV motors, ten MT2216/750kV and eight MT1306/3100kV motors for sale at a discount over retail. PM me for a DIY Drones member price.