I am curious about the new iMacs with the 2T hard drive. This is a very attractive option for me because right now my 5 year old iMac only has 1/4 of that capacity and sub sequentially I have to use external drives for my photo catalog. Then another external drive for my time machine back up. Not to mention that ran outof ports and have to use a hub, so it's a mess. My catalog is not that big, with about 1000 images it's about 500 MG in size or 1/2 a Terabyte. So my question, are there speed issues with an internal drive this large? Perhaps I should go with the 1T drive, although then I run the risk of maxing it out as I would be getting close. Or I can continue with the external drives, but that is a pita and messy in my opinion.