Your tablets are sweet...but way beyond my means. I'd be shooting for a LT C-500 Fujitsu Stylistic or something comparable. Still, 2.5 pounds or so isn't feather-weight, but about like a big hard back book.
The Sony reader felt wonderful, but didn't do what I wanted a reader to do at that price point... I suppose I'm a few years yet from getting the reader I want for what I want to pay for it.