After browsing ebay and CL it seems to me that 2009 is the sweet spot for buying a used 15" MBP. 2010 brings resell price near 2011 but 2009 platform is at the same bus speed as 2010, but at a considerably lower price. Do you think I could get a few years of satisfaction from a 2009 model with a HDD and ram refresh? BTW this will be my first Mac! 