So my MBP should be arriving tomorrow or Monday(I'm so excited to get my first Apple computer). But it comes with a 100GB HDD and OSX 10.5 Leopard. I'm debating whether I should spend my current money on upgrading to Snow Leopard or save up another $20 to get a 250GB or possibly a 500GB HDD. So the real question is: Should I spend my money now to get Snow Leopard or save up a little more to get a bigger Hard Drive? Also is there a noticeable difference between Leopard and Snow Leopard? Because if not I'll just wait till OSX Lion.