[kobokobe]

Although I have both the Touch and the Glo, my opinion is that neither of them are a "must" if you already have a Kobo. Unless, of course you read heavily in bed, then the Glo borders on being a necessity although you could just use another light source (the difference in reading experience is, however, more significant than I had previously thought).

Since you have the original Kobo, you would also be getting another feature in the form of a touch screen, which I don't consider to be necessary at all for ereaders unless you do a lot of note taking, browsing books directly from your device, or maybe if you like to frequently switch between books.

I would suggest going to the store and trying the Glo, and deciding if it's worth dishing out $130 + tax. Although you most likely won't be able to test night-time reading. I don't suggest buying and returning once you feel it is not worthy, because that doesn't seem to work with most people, but if you feel that you're strong enough..