I'm getting my new Imac in a couple of days and I'm going to extend my RAM memory myself. The capacity is 4x4 GB RAM, so that's the amount I want to put in. I looked around and found kingston 4 gb RAM chips, as well from Dolphin, GeIL and OCZ. Also the timing (CL9 9-9-20 till CL9 9-9-36) differs a lot. What are the best RAM cards to use?