While we're at it, thinking big, how about a rear projection system for nighttime outdoor pool watching?
Dawg, is there a very large paned window easily viewable from where the pool will be?
No electronics will be outside, except perhaps for a pair of outdoor speakers.
I suppose there might be an outside chance of using the same PJ for both indoor/outdoor, but you'll have to play with zoom, shift, and PJ orientation each time. Then again, the latest Panny's have programmable preset zoom + focus.
edit: oh yeah, you'd have to "flip" image each time too, unless you don't care about mirror image.
Or just get a cheapo PJ for the application.