You post quite a broad question.The motor/controler is really dependent on how much$$$$ you want to spend.Most of the real hot gliders use brushless motors. Like Hacker,Aveox,plettenburg,Kontronics.Here's a couple of web sites to check out,
www.aero-model.com and
www.nesail.com Another choice is to come to the WRAM show in new york(feb 21,22,23) good luck.stefanP