I've been playing about with different ideas for a desktop Mac for some time. I've now decided and will be buying a Mini next month. Question is, which of these two specs is better for light games such as The Sims 3 and Portal 2. Both these configs meet the minimum specs of both games, but which one would run it better? 2.0GHz quad i7, 4GB RAM, Intel HD Graphics 3000 2.7GHz dual i7, 4GB RAM, AMD Radeon HD 6630M w/ 256MB GDDR5 Also, would increasing the RAM to 8GB make much performance difference in games? Cheers.