I have screen protectors on all my LCDs (except my tvs) - I bought this one for my Kindle DX after i put on the same one for my K2: gadget guard:
http://www.gadgetguard.com/magento/i...lds-skins.html
It is very easy to read through, minimal reflectance, very strong protection, though can be difficult to put on: I use a spray of 1 drop of dishwasher soap in a cup of distilled water to keep the film slippery before final positioning.You have to have some lens-cloth available constantly to soak up extra liquid so you don't damage your KDX. Because of the huge size of the KDX gadgetguard, this process was NOT easy, but I'm happy with my result.