What essential features or functions should I look for on a powered snow plough

• Heavy duty pneumatic tyres with deep patterns for gripping in icy conditions. 
• It should be be manoeuvrable and easy to operate and it should have a generous clearing width, at least 80cm
• It should have a very tough, metal blade
• It ought to be be fitted with a hardwearing but flexible rubber scraper-bar at the base of the blade. This offers a longer life for the blade as the rubber bar is usually replaceable, and delivers a ‘Back-to-Black’ right down to the surface clearance.