Hi and apologies for the long winded post. I am hoping someone here can help me with a couple of questions. My uses aside from the normal daily tasks are stock trading/research and light games (older games like World of Warcraft, at native resolution). Other than adequate performance my most important priority is to have minimum fan noise while doing these activities. I intend to keep the computer for 18-24 months. Regardless of other options I have decided to select the SSD. Now on my MacBook Pro these activities run fine so I have no doubt that the minimum iMac specs will suit my needs. However the fan comes on with the MBP so my question is is it better to choose the i7 processor and the faster GFX with more memory on it? As a computer idiot my logic is the more powerful components will not have to work as hard and so produce less heat. Is this actually the case or do more powerful components produce more heat regardless of workload? My other question is which screen size to buy. Does the 27" iMac have different cooling capability due to its larger size or are both computers the same? The 27" screen is a benefit to me but the extra pixels obviously result in extra GPU (and CPU?) usage so again comes back to heat. I would opt for the 21" model if the 27" meant sacrificing silentness. Thanks in advance.