I think I used the phrase 'carelessly tossing around' a bit too carelessly
What I really meant was I don't want to baby it. Just something I can gently toss onto my (soft) bed, the (covered) sand and (admittedly hard) tables; not constant six feet high impact on concrete. Basically nothing more fragile than the Nook STR and its screen, which have worked out very well despite my relatively rough handling.
I'll be keeping an eye out for the Glo HD, but to be honest, I don't need or want fancy new technology or screen that straddles the thin line between a functional e-reader and a tablet. I'm tempted by the H2O because sand used to get in the bevel and affect the touchscreen page turn capability.
I will happily continue using my Nook STR (withOUT glowlight) but I want a built-in light and that's pretty much it. If the Glo HD has a supposedly better light, I think I'll wait. Maybe the price for the Glo will fall and I'll get that when the Glo HD comes out.
Thanks everyone!