ipad1 upgrade to ipad3 (the new iPad) or ipad2?
Hi, I have owned my ipad1 since it was available for sell. My iPad 1 still runs perfectly. Now I am debating whether I should upgrade it to iPad 2 or ipad3, or simply keep using iPad1 until ipad4 becomes available. I use iPad for reading pdf documents (scientific papers) (no movies, games, etc.). Is it worth to buy a new iPad? If yes, should I get an ipad2 or iPad 3. By reading the previous posts in the forum, I found ipad3 has problems of overheating and short battery life. Is that really true even for reading PDF documents? Would iPad 3 hurt my eyes less for long time reading than iPad 1/2? Thanks for any advice.