Tohtruck--glad to hear you're going to get the Buzz One! The tire question is pretty easy--700 refers to the diameter of the tires, 700mm, which is pretty standard for road bikes. The second number refers to the width of the tire. 28-32 is common for most city bikes and commuters. Y
I looked up the Buzz One, and it's stock tires are 700x40--really wide! I looked up the Brougham, and it looks like it has a 23 in the front, and a 28 in the back. So your friend's idea goes along with what Felt has already done.
From REI's selection, I'd consider the Serfas Seca tire:
http://www.rei.com/product/724618/se...700-x-23-25-28
It has pretty good reviews online, especially as far as flats are concerned. Good luck!