I'm planning to buy a new digital camera with a background defocus and good in low light.. So here's what I want.. Sony WX7.. The problem is, it's already phase out here in our country and the WX9 is available.. What are the differences of these two? What are the advantages of each camera? Please help..

And would it be OK I'm going to use 1 8gb as memory SD instead of 2 4gb?