Should I get Asus Transformer vs. Ipod vs. Ipad mini?

Currently, I have an ipod 3rd gen and I use it all the time. Before I got to bed (I fall asleep surfing), while in the bathroom, listen to youtube cooking or cleaning, while walking/running on treadmill or when I am half watching tv. I love it. But the problem is:

1) This ipod is for family use and I can’t take it out with me since I have other siblings who want to use it.
2) Being 3rd gen many of the apps that I once used are not compatible.

I am looking to get something for myself (not share with family), plus the new gym doesn’t have entertainment. For gym bigger screen like the Ipad will be nice but I don't mind the current screen size of the Ipod as I can put that in my tiny purse or pocket. I am debating between:

1) Ipod 5th gen or even the Ipad mini (what is the major diff between those?)
2) Asus Transformer (I think it’s cool that I can transform it into a netbook & can use it for office/study purpose unlike the apple product)

I know the touch screen is perfect on Apple product. I am not sure how Asus is but I seen few people with it and they are very happy with it.