I updated to Lion and installed Aperture at the same time. I notice when I do some editing to a set of photos I just uploaded I get serious system slow downs. I have 4gb of ram and in Activity monitor Aperture is using just over 2gb of it leaving me with somewhere around 150mb free!!! My page in's are around 6 gb and pages out's are about 4.5gb. Is this a lion issue or should I consider 8gb of ram with a program like Aperture?