I have 3 boys (12-10-7), guess I should include myself in the group according to my wife. Wanted to buy them an xbox this christmas. I have seen on slickdeals and other outlets multiple advertisements and promotions. What should I look for or be concerned with. I have seen different sizes of GB. What would you consider important and minimums. I don't want to jump in on what might look like a good deal only to find out 2 months later that I screwed up and should have spent $20 more for a slightly different system. Also, what should I get separately? (extra game consoles, kinetic- is it worth it?) etc. Thanks for any input.