You shouldn't have given away your Kobo Glo HD!
There isn't much feedback on the Kobo Aura Edition 2 because its slightly inferior to the Glo HD, so who wants to buy it?
Kindle Paperwhite is probably the most similar to the Glo HD, but that might not be ideal if you have already invested in an .epub library having previously owned a Kobo (plus no games whereas the Kobo has chess & sudoku).
The Aura H2O is a good option if you'd consider the slightly bigger 6.8" screen.
Other 6" models you could consider are Tolino vision 4 HD or PocketBook Touch HD.