GingerChristmas :
That one's really nice too and looks light. Can't decide which I like best of those 3. Last one definitely a great price!
That's why you need details about the use, the others are faster so will run more demanding programs, the cheaper one is fine for basic use like documents and web browsing and some older games even like SIMS 3, Half-Life 2, etc... It's also less "designed" than the thinner ASUS ZenBook which makes it cheaper. A $500 laptop is plenty for most people, unless you are gaming or doing heavy number crunching, anything over that is a design thing, or unless you want something specific like a very good screen or long battery life or small and thin. If all you want is a laptop that is not too slow and will run programs and keep multiple things open reasonably well, $500 is all you need to spend. For $700+ you add in things like better screens, faster CPUs, faster video cards, fancy metal cases.
If you had a $1,000 budget and don't care much about gaming, I'd get the ASUS Zenbook, I'm pretty sure it's the one you'd get if you had no money issues, and since the laptop will be with you for years, spending a few 100 to get what you really want vs a comporomize is worth it. I spent $300 on a set of speakers 15 years ago instead of $100, have never regretted it. But if I bought the $100 set, I would be thinking all the time "should have gotten the better ones" LOL.