I was deciding between these two a few months ago myself.
What I ended up buying was a Macbook Pro. I am extremely happy with my decision!
Before this MBP I had no experience with Apple or OSX. My Aunt works for IBM and could have gotten me a sweet deal on the notebook of my choice, but after playing around with them I decided to give apple a try.
Here is what I have found with the MBP.
First resell value is very high. If you dont like it, sell it. You will get most of your money back.
But I have found that I have not had to load the first driver for anything. My MBP recognizes my printer, my sisters printer I hooked up once, my camera...anything I have had hooked up was recognized and worked.
This notebook is very fast to. I hear thats basically OSX doing its thing. Im impressed.
I dont hear any fan noise from this notebook...and what just amazes me the most is everything just seems to work without fiddling like I have to do in windows.
Now Im not a windows hater, I actually used to think Windows was pretty good and couldnt understand why everyone seems to bag on it, but after my experience with OSX I can see how bad windows is.
I have found everything I needed to have so far work on this MBP. There seems to be a comparable program for everything. There also seems to be a few things Windows doesnt have that I can get for my mac.
The keyboard is wide and has good feedback (and is backlit

The screen is very nice.
I may be typing all this in the wrong place, since I know you said you were looking at a macbook and not the pro, and Im not too fond of that keyboard either, but let me tell you after using OSX for a couple weeks I am hooked. So much so Im going to sell my recently built PC.
Like I said I could have gotten a sweet deal on a Thinkpad, but chose to go with the MacbookPro, and I was thinking the hour after I bought it what the hell did I just do, Im going to regret getting a non-compatible computer, but after my experience I am soooo glad I took the chance and found out how great OSX is.
If you like to tinker then the MAC is not for you. Its true that there really is no upgrading, except for RAM or HDD, but I like how the MAC was designed and built with an operating system in mind...no driver fiddling and everything works seamlessly.
And there is bootcamp for my engineering programs I already have for Windows.
Goodluck with your purchase. I know it can be daunting to decide as it was for me, and thought I made a mistake right after I bought it, but turned out to be one of the best decisions I have made (better than the girlfriend thats for sure
Later man