Hi there - my late 2009 13 inch MacBook Pro sadly stopped working recently and as I will be in the USA this summer I figure now makes a good time for me to upgrade. I have a question - I mostly use my mac for lightish-medium use (iTunes, office, handbrake, aperture) but occasionally like to play games. Usually strategy games so not necessarily as intensive as some shooters. I also play them directly in OSX as opposed to running bootcamp. Therefore, I am quite drawn to the 15inch as it is the only MBP with the dedicated graphics card. Do you think that the NVIDIA card makes a 'huge' difference over the iris? And does running the games in OSX reduce the graphical load when compared to running them in bootcamp? The main reason for asking is I have seen a few threads that mention concerns about excessive heating - and it seems to be related (unless I'm wrong) to the dedicated graphics cars. Is over-hearing a major problem for the majority of users of the above MBP, or just a few unlucky ones? Thanks very much in advance for your help.