Hmm...thanks everyone for piping up. Good points made by everyone.
Ediorian, I think I should follow your sage advice and save myself the money and trouble. I was initially very attracted to the new aluminum case, which I would assume feels much sturdier than my current plastic MacBook. That plus the new trackpad that enables multitouch and gestures.
Performance-wise, I'm not looking for much out of the machine. So far I've only typed up my screenplay on it, burned an occasional disc, and browsed the web. But I was getting rather tired of having to press Command+[ and Command+] to go back and forth in Safari. I was hoping that some kind of new gestures from the new touchpad would allow me to simply swipe my fingers to go back and forth in my history.
Royale with cheese, I think your upgrade model is a sound one and I am not ashamed to say that I will be taking your idea and using it myself!
So, overall, with everyone's input, I've decided NOT to go through the hassle of getting the new aluminum MacBook. Thanks everyone!
And though this may be off-topic, I just had one quick question to ask: does anyone know if I can somehow get a touchpad gesture to go back and forth in Safari?
Again, thank you everyone for pitching in!