Anything reflective is going to have a glare problem as some point. LCDs are no exception. You can take measures to counteract the glare by mounting the LCD slightly higher and angleing the screen more downward, this will reduce glare by pointing the reflecting light down. Another common practice is to tint your windows. I've heard things about Xenarcs with an anti-glare coating or film, but I've never heard that they are much better than any other. The last thing to keep in mind is that the brighter your screen is, the better you can see it durring the day, but the more annoying it is at night and you're more likely to get noticed by "the fuzz."
I have a Lilliput, live in Arizona (lots of bright sun), without tinted windows and my screen is at a 45 degree angle facing up, plus I wear sunglasses all the time. I can still read it with the sun directly on the screen. Can I read it well? No, but it's still legible.
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