I love my last-of-the-BlackBooks plastic MacBook. She is one heck of a machine and if she doesn't outlive my degree I'll be surprised.
I didn't buy her because she was black, I bought her because I wasn't prepared to buy a MacBook Pro but I still needed a high performance laptop for all my messing around in GarageBand for my radio degree (they use f***ing Adobe Audition in the studios on 5 year old Dell machines. NONE of them work. AT ALL. 10GB hard disk my arse). But in my opinion I do prefer the black finish to the white, because I know if I had the white one it'd be constantly filthy!
The BlackBook does not have a matte screen, it is the same glossy panel as the WhiteBook.
As for polycarbonate vs aluminium, Well I guess I'm just a traditionalist. Since the eMac and iMac G4, everything at Apple has been white polycarbonate. The computer, the keyboard, the mouse, the power supply, the ethernet base station, the iPod, yada yada. I don't think we're ready to move on. Man I miss the iMac G4. They were the best designed computer ever.
Good luck on saving for your MacBook. Remember there are always college and university discounts available. If you're in America there could also be a tax holiday approaching. If you're in Britain, then yeah the 16% "you're in Britain you must pay more than everyone in the world except Switzerland and Norway" random Apple tax on top of VAT is a pain in the arse.
Wolf ∑:•p