I'm a researcher and I strongly advice against buying a T1 for reading research papers. I have a T1 and I love it for recreational reading but it was useless for research articles. Here is an example of my previous frustration, at the time when I was still thinking that I could fill my T1 with my research library:
https://www.mobileread.com/forums/sho...d.php?t=156702
I recommend a refurbished iPad2, or any other 10" tablet.