Well, personally im intrested in the asus eee pad series,
the first one its i guess around 400 but im nog 100% sure.
it gives you a tablet that has the specs you usually expect
from the samsung galaxy tab for example. but some things different.
i even prefer the eee pad because you can add a dock with a
QWERTY-Keyboard that adds up a battery and a usb-hub.
i'm looking for one myself too, but you can wait for the
asus eee pad prime, it should be in stores soon. the dock included
and comes with a quad-core processor and a 8 megapixel camera with flash.
personally i think the camera is a bit too much. because its a tablet
and not a Camera.
but this is what i prefer. i hope this helped you a little