The machine will be used for tuning fuel injected vehicles and reading data from data recorder on a race car. Windows based software. Occasional web browsing and e-mail, maybe a movie and some music. Never any gaming or anything that would require tons of processor or HD space. I'm looking for durability and decent battery life and cost must be LOW. I am buying tomorrow from a chain store more than likely. I don't have time to order online as I am in need of the machine now. What's the best deal out there, what should I stay away from, what store to stay away from, etc. Thanks in advance.