Owmygod ThunkDifferent, I recommend you reading Mellgross post (at the beginning of the second page)!
The so called hallelujah matte screen is a disaster in sunlight! Every morning I have to keep my curtains down as the sunlight makes my clean matte 20" cinema display look dusty and unreadable. Okay, there's no glare, but all the colours just fade away in the sun!
Maybe you should try this with your G5 and experience it yourself