RE: what do you think about Astro 25 brushless motor
I'm not sure what you are asking. Astro Flight makes quality motors and probably the only gearbox that I would still consider using since I am an avid outrunner fan.
The Astro 25 can produce around 1000 watts and can be used [link=http://www.astroflight.com/e/env/0001spEDGdR2Z4MqfM6U9R4/store/store-Brushless.html?link=/store/store-type-tem.html&item=products:af-825m]direct drive[/link] or [link=http://www.astroflight.com/e/env/0001spEDGdR2Z4MqfM8A5H2/store/store-Brushless.html?link=/store/store-type-tem.html&item=products:af-825gm]geared[/link].