Hi, Im now to order 8GB memory for my MacBook Pro, but I was just wondering.. Is there better to buy a KIT with 2x4GB together or is it the same if I just bought 2 singles (not as a kit)... Does it has something to do with the performance and dual-channel effect? The price is some higher on the kit, than buying two singles, thats why I had to ask! Would be happy with some answers on this.. Appreciate it!