i have 3 : my first was an ebookwise, because it was an inexpensive way to test the waters. then i got a sony 700 because i liked reading on the eb1150 but it was too heavy, and i wanted a non-backlit / e-ink screen, and epub support. then i got the sony 600 because it is basically everything i originally wanted from the 700.
i checked "i want more" because i would love to get a smaller and lighter device (5") to carry around in my bag with me. also i'd like a colour device when they come out. and it would be nice to have a device with a plastic substrate screen instead of glass, so i wouldn't worry so much about breaking it. also i really want a french dictionary / more flexible dictionary support, which will probably mean a different device rather than an update to one of my current ones. actually maybe i just like gadgets and want lots.