I have an iMac on the way with the following specs: 3.4GHz Quad-Core Intel Core i7 4GB 1333MHz DDR3 SDRAM - 2x2GB 2TB Serial ATA Drive+256GB SSD AMD Radeon HD 6970M 2GB GDDR5 I've only ever used an MBP with 2GB of RAM and it's rather sluggish at times. I figured instead of rushing out to add 8GB to my machine right away (bringing it to 12GB), I would stick with 4GB and see if it runs fine. My questions are: 1. Will only having 4GB hurt the HDD? Or the SSD for that matter? Will it cause either drive to 'work' more and therefore damage its performance, longevity, etc.? Or will it be alright? 2. The question in the thread title. Is there any advantage to adding RAM earlier as opposed to, say, a few months down the line when I know for sure that 4GB of RAM isn't cutting it. Thanks in advance.