So I recently bought the new MacBook Air base model wit 2GB of ram and I have to admit that I love it. I was amazed to find that it runs World Of Warcraft extremely well. That said, our apple store here just got ones with 4GB of ram and the price difference is only $90. My question is, is there any chance at all that 4GB might actually make it slower at running WoW? I mean, is it possible that the 2GB of ram has a battery power --> video card --> ram --> HDD sweet spot that just works extremely well and requiring a tiny bit more power for the ram might screw that up somehow? honestly this is my first mac, and looking at the specs as a PC user (former?) I would say the thing shouldn't even run WoW... I just want to make sure that I'll still be able to run WoW just as well, if not better, if I upgrade to 4GB of ram? I just feel I'm going to kick myself in a year or so if I don't.