I have a Early 2009 Mac Pro. I've seen a lot of threads on comparing the Electra to the Extreme (both SATA 6G). When looking at the 120GB capacities in most of the threads, the difference in price is quite small. So if I wanted a small capacity, I wouldn't ask this thread. The issue is for my needs, I require the 480GB model. The difference in price is $200, which is quite a bit. I've called OWC and their sales team is no help seeing all they can do is read off their data sheets which I can do as well. I cannot exceed the incompressible data rate of the Electra drive, so that's why I do not believe I need the faster Extreme variant. I do not plan to move this drive to a SATA 3 machine anytime at all. The reason I'm only comparing these two models is because I have always had good experience with purchasing OWC branded products, not to mention they offer a cheaper solution compared to other brands like OCZ, etc. I do not care about 3 year vs 5 year warranties because I will be upgrading in 3 years time if not sooner. I would love to hear people's experience if any on these two drives in their Mac Pros. Currently I have the Electra in my cart and I want to see if there is any other incentive to pay for the more expensive model, otherwise I think I should just get the Electra. Mainly I'm looking for say better data management in cases of power failures (although I use an UPS), etc. What are people's thoughts on this? Thanks!