Well, we do have a Kindle but I do not like reading on it at all. so I use my N800 and my Sony nx73v (I did not see the PDA option as I typically stop reading anything that begins with iPhone or iPod...)
Overall I read the most on my N800 indoors and my nx73v outdoors...and yeah, it's a real, ummmm, treat trying to find the same place in the book, if I want to try and read the same book on the other device.
My better half loves the Kindle, but she also seems to like me too...which proves she is not very discerning.