I went with the base 2.6ghz 15 inch and was wondering how long this would last me. My current laptop is a mid 2010 13 inch with a 2.4 ghz dual core and it slowed down considerably. There was no way for me to pay the extra cash to max out the processor. Do you think the base quad core will still be fast 4-5 years from now? Can anyone that has a 2011-2012 quad core share their experience?