Ordering my first-ever Mac, blah blah blah..... I'm wondering about the difference in the two hard drive options (the regular drives, not the SSD's), and which I should get. I assume that the 500GB @ 7200 rpm is faster, while the 750GB @5400 rmp holds more data, but is slower. I plan on getting the 2.3ghz core (though I have yet to decide on how much ram; you know, ye old 4GB vs 8GB discussion). How much faster is the 7200 rpm? Noticeable? Is it just loading files or what? Unless the difference is amazing, I'll probably go with the 750GB, just to have the space available to me. I really have no idea how much space I'll need.... (right now, I'm on a PC with just 136GB of memory, from like 5 or 6 years ago, but I have a Toshiba external drive with 640GB for games and things.) So...thanks for reading. Sorry if it's rambling a bit I appreciate any advice you can give me.