As the cost of replacing my HD with a SSD and/or upgrading RAM begin to add up in my head, I'm starting to wonder what is the best route to go. For my mid-2010 MBP (MacBookPro6,2) , i would like to see a performance upgrade. I would also like to extend the life of my computer. Do I go with a SSD? Or do I upgrade the RAM from 4GB to 8GB?