What are the best dog grooming clippers?

Im a beginner in the dog grooming business what are the best clippers (for the price) to invest in?

I prefer Oster but there are a lot of new ones on the market.

Well, It really depends on what you mean you "beginner in the grooming business". Are you a professional groomer, or at home grooming your own dog./cat? I would recommend totally different clippers for the two options