@seale_navy,
If u are using ur own $ u should be able to make some decision as to which machine to get. Ur folks seem to be sceptical about Mac vs Windows so all u need to do is convince them that the Mac is as good, if not better, than Windows.
1) Yes there are skin protectors for the Mac; or get the black one instead
2) Leopard's an Operating System, just like Window Vista. And "MY COMPUTER" is really the same as "Macintosh HD"
3) iPod is from Apple and it's the product that turned Apple around; how can Apple not be famous? Also, Y would Nike (and equally well known international brand) partner with Apple on the iPod Runners [or whatever u call it] if Apple weren't good? Also, when Apple introduced the iPhone it took the world by storm
4) If u need, U can always run Windows on your OSX - Mac OS allows that; And just what programs do u use? If u can justify and show ur dad the programs u use are compatible with Windows it'll be better
5) I can't help u there
6) The additional benefit of not worrying about spam/spy/viruses
7) If u need, U can also use the weight as a point to ur argument [depending on the other machine ur looking at]
All in all, U just need to be convincing enough; though I feel ur folks think u decided on a Mac because ur friends find it cool and u just wanna be cool. All in all, if they really don't want u to get a Mac, they'll find their reasons; the keyboard not nice to type on, the trackpad no double click like Windows, etc etc.
Good Luck!

And Yeah quit complaining cause when I was a student, I had to use the computers available at the library!