I have a 15" MPB Penryn for 7.5 months, do you think I should sell it and get the new one Tuesday? If it's just a speed bump, I wouldn't even consider it. But with the new case, it's tempting because I feel like my laptop will look dated when the new one releases in a few days. And I only have the laptop for less than 8 months! What do you think? This is my first Mac.