I'm trying to decide between the T2010 and T4220. I'm only looking to do basic apps past email and notetaking (ex. mathematica). I like the T4220 because I feel more comfortable with a heavier, more powerful tablet. I feel like its less likely I'll run into power problems and it still seems pretty small. In a tablet for notetaking I want something that will be as inobtrusive as possible. I like the T2010 because it is very light and seems like it should be very low heat and noise. How's the screen for reading for long periods? Does the indoor/outdoor feature make a big difference? Do you take advantage of the battery life? Is there a significant difference between quality of notetaking?