With my HTPC setup I don't rip my Blu-rays. I personally don't think it's worth the space they take up (up to 50GB). I've been meaning to buy a couple large disc wallets and putting my whole disc collection in those (CD/DVD and maybe Blu-ray) and just chucking all the packaging. You'll be able condense your 4 book shelves into something that will fit in a cabinet.
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