Grape juice can be any make, I tend to buy according to price and the best at the moment seems to be Aldi at 85p/litre.
Watch out for grape juice drinks, which might actually contain very little grape juice.
Unless you really go up-market to something like the Welch's Purple (pressed from Concord wine grapes), most supermarket grape juices are pressed from mostly eating grapes.
And yes, some fermenting fruits can stink, it is a controlled rotting process after all. Apples and pears can be pretty bad but the eggy, sulphurous smell will pass.