Would like some advice on the best drive for this purpose. System is a Macbook Pro 15", 8,2 early 2011 Model. Shipped with a stock 500gb Hitachi Drive. Replaced the stock drive with a 256gb Samsung 830 SSD. Very happy with the performance and speed. Everything seems stable, TRIM enabled as well. But I need more space! I installed the OWC Data Doubler and a momentus XT 500gb (old model, with new firmware). Now I find that the vibrations and noise are really annoying. Battery life seems to have gone down by as much as 30% (vs with SSD only) So with that in mind I am planning to get a second SSD for the optibay. The word on the street is that the 8,2 MacBooks dont reliably support 6gb/s, so I am on the hunt for a 3gb/s unit. 128gb would be fine for size, but the speed rules out another Samsung 830. Any ideas on the best options for this? This will be a storage drive only and not for booting, but it should be reliable enough not to die randomly. The other option is to just stick the stock 500gb hitachi in there, I dont recall anywhere near the vibrations I am feeling now with that slower drive. Any help would be much appreciated.