The first two stage I ever owned was a Canadian built Noma, they were bought out by MTD and parts are kind of hard to get. I bought a two stage Toro with the joystick control a couple of years ago and am very happy with it. I am the only guy on the block that can clear the berm that the plow leaves in my driveway usually on one pass. I think you need at least 8 horsepower and I really like electric start, mine must be plugged into the wall for electricity but thats OK because I don't have to worry about a battery. One thing I learned was once the thing was running and warmed up, when shut off for a period of five minutes or so I click the choke to the first notch, full throttle and it will pull start on the first stroke. I added a little guide to the left side of the front which extends about 6" forward, I noticed mine would throw a little bit of snow out there, the guide stops that and provides me with an aiming point when clearing the sidewalk after the plow shoves all that snow over. I used all kinds of snow machines while working in building maintenance for a transit company, clearing all the park and ride facilities. One thing I learned is that there is no substitute for horsepower and always carry plenty of extra shear pins and the tools to change them. Chains are nice...The big Ariens models are top flight, the best motors are Tecumsah Snow Kings, they have a little stove for the carb to keep the air warm.