I'm in the market for a tiller and need some help. I don't want to buy a $200 machine that I never use because it is underpowered or too hard to use. What features should I be looking for? Here are some areas that I'm unsure of. Horsepower Rear or front tines Any particular brand better than others? Other considerations? fwiw, I want to do general landscaping around the house and also to till up the soil before adding raised beds for a 10 X 50 foot vegetable garden. Our soil type here is clay. Thanks.