Tablet for about 10,000

hi !
I am looking for tablet for my parents.
So i wont be needing it for gaming.

I am confused between:-

Asus Fonepad 7 me175cg -11,000
FE170CG -8000
dell venue 7 (16gb/3g) - 10,000 .
Dell Venue 8 (16 GB) - 10,000


Also Can any please let me know what is available storage space in these tablets for Applications ONLY ??
Thanks in advance