Would like to go with Glo!
I'm also looking at Glo vs PW (as I get older I'm finding my PRS-505 just doesn't have the contrast and I have to put the light on earlier and earlier).
In fact i'm getting the kids readers for xmas so i'm in the market for three.
I'd really like to get the Glo. A reward for Kobo for bringing it to the UK and a punishment for Amazon for not doing so.
The only thing holding me back is a niggling suspicion that the Glo just won't have the polish of the PW. I'm going to wait until I can hold the Glo in my own hands and give it a go. I assume they'll be at WH Smith shortly.