I have an i5 2010 MBP with 8 gig of RAM and a 256gig SSD + 1TB drive configured as a fusion drive. So it's almost 5 years old and I've never had a PC (as in Windows PC) longer than 2.5 years. So I'm trying to decide if my desire to upgrade is force of habit or if their is another good argument to get a new retina MBP. I can't really say I have any issues with what I have. I'd appreciate a few comments.