I tried to use ipad as my primary reader but it's a little too heavy. Maybe the ipad2 is whole lot better since it's noticeably lighter.
As for PDF viewing, based on experience with the way my father uses his ipad to look at diagrams in pdf format, ipad 2 will be a much better choice with additional memory and faster processor. He has ran into numerous issues with not enough memory or slow performance in opening PDF documents with various viewers.
As for PDF viewing, based on experience with the way my father uses his ipad to look at diagrams in pdf format, ipad 2 will be a much better choice with additional memory and faster processor. He has ran into numerous issues with not enough memory or slow performance in opening PDF documents with various viewers.