I'm a grad student. I want a laptop for word processing, excel spreadsheets, wireless internet, and watching DVD's. There are lots of discount computer stores in my town selling refurbished units, and there's craigslist, and of course e-bay... The discount stores offer a limited warranty, but generally wipe the hard-drive so I'd have to spend $$$ for word and excel, but I dunno how trustworthy e-bay and want-ads are - or if I'm likely to find someone offering the software with the computer. Anyhoo, curious what source y'all would recommend (and if you have any recommendations for minimum system features as well - ?GHz, ?size H.D., ?best screen, etc.)...