yes ,Android tablets can download, store and DISPLAY PDF files
i have a bunch on my 4yr old Motorola Xoom tablet
if you look at tablets stick with NAME brands Acer, LG, Samsung, Motorola
they have the Best displays, and this is a two sided coin
best to look at and most responsive when using
but i think you might be happier with a laptop
a 15" touch screen Android tablet might be hard to find
and windows tablets will be dealing with Win 8.1
although i admit, i haven't used windows in touch mode
on laptops .. well i'm not very enamored of this Celeron (2) core, Dell
that i'm using, as cheap as $200 when on sale at FRYs electronics
of course i have six windows and 20 tabs open
but i don't think Win 8.1 is very friendly to any TWO CORE processor
but if it can do this for me (even grudgingly) it should handle your surfing needs
i can't give any first hand advice about other mfg processors such as AMD
