Reading on Ipad Mini?

I am debating a holiday gift.. My son is an avid reader so I am considering either:

Kindle PaperWhite (I have it and love it) + Ipod touch

or

Ipad Mini retina (when it comes out)

He has a fullsized ipad which he shares with his sister and mom...

I used to read on my ipad, but think it is too heavy,,, like that I can hold the paperwhite one handed without it feeling heavy.. but I am not sure what the reading experience is like with the ipad mini

thoughts?