Girl, if you have money, I recommend using W7. The new W7 is great.
Nowadays, many people, including vice president of ASUS Mainland and brand center, are using W7.
But the price is slightly higher than your requirements.
You'd better use F8, which can be configured at a lower level.
After all, F8 is now the main force of ASUS, which is relatively balanced, beautiful and of good quality.
Mind you, F8 is a bit heavy, as long as you don't have to take it to work every day.