As a previous Prs-505 owner, I'm quite dissatisfied from glare issue on Prs-600, really dissapointing, but I give a try to Lexerd's TrueVue anti-glare screen protector.
Bought from Amazon.com, will ship to my country in just 4 days, working perfectly, glare is reduced by at least 50%, almost same quality in prs-505, no lost in contrast.
http://www.amazon.com/Lexerd-PRS-600...1554629&sr=8-1
Wish I take before/after photos, The item is strongly recommended !