How do I know how to find the equivalent of this motor? http://www3.towerhobbies.com/cgi-bin...?&I=LXLWT6&P=M I am getting the new GP spad and this is the recommended. I thought I might save a few bucks if I order one from somewhere else in another brand. I am placing an order to hobby city soon so if anyone knows of a good motor like that or even more powerful, please make a suggestion. I will be using the electrifly 25A esc that is recommended. Thanks!