First off, please don't get me wrong- I love the new iSight iMac. It's a stunningly designed computer. But my friends and I were having a discussion today and the following issue came up. Bear in mind that two friends just exchanged their new 20" iMacs for quieter models. One got a very quiet replacement, the other didn't and may try another exchange. Both had dealt with various problems with the Rev A iMac. I brought my old Rev B in for testing twice before returning it due to whining fan noise. The upshot is this: the slim case is a design nightmare. Gorgeous, yes, but when you're sitting at a desk using it would it really matter if it were, say, another inch thicker, giving all the components more breathing room? Personally, I'd take the thicker case if it meant that some of these issues would be resolved. How many people derive any significant benefit from the slim design once the computer is placed on a desk facing (generally speaking) a wall? Form vs. function. I'm not complaining. I'm just asking.