I don't recommend a netbook for Multimedia. Take my word for it.
Let me clarify this: You want a laptop you can take around, while being powerful enough to entertain you. If that's the case, the following will serve you well. Remember, the more you shell out, the more enjoyable of an experience you will have.
-Sony VAIO E
-Sony VAIO CW
-HP DV4I (i have had bad experiences with HP)
- Dell Inspiron 15
- Asus K42 (they have about 4 laptops in this series. You can find this by going into the laptop section of Asus.com and going into versatile performance and searching for k42.)