I'm looking to stick in a 1TB HDD in my MacBook Pro, ideal so I can have all my TV shows and movies on my internal hard drive. Obviously it'll be a 5400rpm drive. I have a 5400rpm drive in it right now. Is there any disadvantages (performance) to having such a big hard drive? Amount of platters v rotation speed? I might look at Optibay too, but don't want to void my warranty. Any thoughts/inputs/suggestions?