Hey I've never experienced such harsh conditions like the ones described but first thing that came to mind while reading your question was the panasonic toughbook series. I've heared and seen some pretty amazing things being done to those toughbooks and they stood tall... It's surely best to do some research but i would surely take those toughbooks in consideration... As with most things it's a matter of choice, you could go for an easy and affordable to replace solution (netbook,...) but since rebuilding backups and stuff every 12 months would like to be avoided, going with a rugged notebook would be worth the thought... http://www.panasonic.com/business/toughbook/toughbook-products.asp