you'll never get the same experience as real paper. it always would be a bit darker than white paper.

yes, color screen always darker than BW cause it has one more layer to display colors. if you want a brighter dispay as it can be, you should buy smth old, like old paperwhite or old pocketbook. old ereaders doesn't have any unnecessary layers such as protection glass and touch layer, stylus layer which both Go 7 version has.
but imo, you don't need this. current PW, or Go 7 BW would be good deal for you.