Thanks for all the tips on the HP laptops.  The problems with general 
flimsiness and loud, unstoppable fans are also reflected in these comments 
(on the model I'm considering):

http://www.amazon.com/HP-G7-2022us-LED-Backlit-Processor-Technology/product-reviews/B008QDJUI6/

When I see two comments in two days both essentially saying "I don't know 
what those other guys are talking about," I wonder if HP put them up to 
it.

I still have an old Dell Latitude D800 from 10 years ago that works today. 
It cost almost $3000 back then!  So durability and longevity are 
important.

Mike