XT60. I think Deans are considered "barbaric" in the RC world. There are much better alternatives from EC3, to XT60's, to TRX connectors. Hell you could even use Castle Creations bullet connectors potentially but I wouldn't recommend it (potential for arcing even if you seal them up properly with heat shrink). eg. like how this guy has his setup (I assume that's his motor connected up to an ESC):
http://www.helifreak.com/attachment....1&d=1309676666