All this talk of dust contamination is making me nervous. So far my Z2 has been dust free, but it feels as if it's only a matter of time before I have a problem. I know that you can air-dust the panels if necessary, but I feel bad recommending a PJ to my mates when I know that this sort of "open-heart surgery" will be necessary at some point. Not everyone is happy taking a screwdriver to a £1200 piece of electronics! Does anyone have a list of which PJ's have a sealed optics system to prevent such problems? I know that the NEC HT 1000/1100 has this feature for instance, but what about other (cheaper) models? I notice that on Nexnix's site, the details for the Sharp XV-Z91 claim it also has sealed optics - is that true?