Good job on the car-boot Pradovit! God I lusted after those. However, I remember a show where the presenter had two Prados and got slide jams all night. What a disaster.
Perhaps the potential of a slide projector is great(er) but there are so many problems. Even with a decent projection lens the problems with edge-to-edge sharpness never went away for me. Slides went out of focus as they heated up and the AF got them back, but it was a distraction. Worst of all, of course, was that you were stuck with the original slides you took and could not edit the scratches out, the highlights down and the shadows up.
Even an 800x600 digital projector is surprisingly good in comparison. When you add the ability to edit digital photos, I really think the digital system wins by a mile. Of course now it's all moot - you can't use a Prado for your A99.
I'd be interested to hear what people are using now. I use an Optoma 800x600 for nature club shows and an HD flatscreen at home (boy do I spend a lot of time editing and cropping), and would like to improve the club projector.
Sony a77ii, RX-100 I; RX10 iii; Rokinon 8mm f/3.5; Tamron 17-50; Sony 70-400G; Lightroom 6.2; Photoshop CS5; PicturesToExe 8.0.