Unless the laws are very different in the US than in Canada, they would be allowed to send a different repaired unit. They could send a new one, but not a used one.
Actually, you'll find that most of the terms you agree to when you sign up on a site or buy something relative to warranty/repair/etc. allows for the OEM to repair, replace or refund at their option. Unless the unit dies in the first 30-60 days, replacement usually means you will get a unit back that has been refurbished and is in generally the same condition/useage area/age of the unit you sent in.
That's the simple letter of the law, so to speak. The smart guys send something back that won't upset you because they value you, want your future business, understand good input by users is much better than bad - pick the one you like. Oppo seems to be on the plus side of the equation.
