Should i get A Roku? I have an Apple TV?

I have $100 in store credit at bestbuy and I'm looking at the Roku. I already have the Apple TV but movies and shows on iTunes are overpriced so I would probably use both of them. I would also look forward to crackle on the Roku because everything on crackle is free. And a question I have is how do you buy... show more I have $100 in store credit at bestbuy and I'm looking at the Roku. I already have the Apple TV but movies and shows on iTunes are overpriced so I would probably use both of them. I would also look forward to crackle on the Roku because everything on crackle is free. And a question I have is how do you buy channels on the Roku if you don't have a credit card? Do you need a credit card to use the Roku? And if I don't get the Roku I'll probably just spend the $100 on a bunch of blu rays or iTunes gift cards for the Apple TV. Should I get the Roku?
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