I want to buy a Dell Inspiron 15 laptop online, are the options I chose for it good?

Unless you're paying separately for the Office 2007, it's a trial version. You can use it for 30 days after which you'd need to purchase it to continue using it. The system build looks well suited for your needs. Opt for 4 GB RAM if your budget permits.. More the RAM, the better. And since you're going for 64-bit Windows, its all the more significant.