"Also, I don't like the taste of beer made with chlorinated water."
Ouch, that sucks. According to Wikipedia (so it must be true ;)
"Christchurch has one of the highest-quality water supplies in the world, rated one of the purest and cleanest water in the world. Untreated, naturally filtered water is sourced, via more than 50 pumping stations surrounding the city, from aquifers emanating from the foothills of the Southern Alps." It's not even fluoridated...
Residential water is covered by our property taxes, no matter how much we use, but I feel it's a shame to use artisian water on the garden, laundry etc...
I think the optimal roof design, at least in our area, is a gabled one with one side facing south to collect maximum rain from the southerlies, and the other facing north to accommodate solar panels. I imagine you could have the entire roof slanted to the south to collect rain, with raised panels to collect solar. I suspect this might be true in areas around the southern coast of Australia as well...I assume you get most of your rain off the Antarctic like we do??