What BLDC motor and ESC should I get

I’m making a spinner battlebot for fun out of a cardboard box. I’m using an arduino uno to control it, because I want to learn arduino and thought this would be a simple gateway. I’m using 6v, 600rpm micro motors to drive it.

. I’m almost finished, the last thing I need to do is the weapon. I’ve been told I should use a brushless dc motor and I don’t know which one to get. Which motor and ESC should I get for a reasonable price range and where can I get it in the UK ?

PS. I’m making the robot for fun, not for any competition.

PPS. I want to destroy stuff so I’d prefer a powerful motor.