Need help to pick between these laptops! Dell/Acer/Lenovo

I need some help guys!
This is going to be my first notebook purchase.

My budget is around $600 , and i have been researching laptops for over a month now.
I will be using the laptop for downloading movies and music. Using ITUNES, burning dvds and cds. Also very heavily internet browsing. And will be watching youtube a lot, while multitasking...

I also want to play STARCRAFT 2!! Thats pretty much the only video game i want to play on a computer at this moment. (loved starcraft) ..

These are the laptops i have narrowed my search down too. But need help deciding!
Because watching movies and LISTENTING TO MUSIC , are my top priorities!!!
Need a good sounding laptop!

http://www.newegg.com/Product/Product.aspx?Item=N82E168...
DELL INSPIRION i15 r
Intel Core i3 380M(2.53GHz) 15.6" 4GB Memory DDR3 1333 640GB HDD 5400rpm DVD±R/RW Intel HD Graphics
$549.99

Asustek Laptop the list you have forget about those.


http://www.newegg.com/Product/Product.aspx?Item=N82E168...
lenovo IdeaPad Z560 (0914-4HU) NoteBook Intel Core i3 380M(2.53GHz) 15.6" 4GB Memory DDR3 1066 500GB HDD 5400rpm DVD±R/RW NVIDIA GeForce 310M
$599.99


http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Acer Aspire TimelineX AS5820T-6401 Notebook Intel Core i5 480M(2.66GHz) 15.6" 4GB Memory DDR3 1066 640GB HDD 5400rpm DVD Super Multi Intel HD Graphics
$629.99

Mind you guys, i am upgrading from a DELL DIMENSION 3000 DESKTOP. That is over 6 years old. it has a Pentium 4 2.8 ghz processor, 512mb of ddr2 ram... and worse of all no video card no sound card and 80 GIGS OF RAM LOL!!!

So any help would be greatly appreciated!!! Thanks again GUYS!!

I need some help guys!
This is going to be my first notebook purchase.

My budget is around $600 , and i have been researching laptops for over a month now.
I will be using the laptop for downloading movies and music. Using ITUNES, burning dvds and cds. Also very heavily internet browsing. And will be watching youtube a lot, while multitasking...

I also want to play STARCRAFT 2!! Thats pretty much the only video game i want to play on a computer at this moment. (loved starcraft) ..

These are the laptops i have narrowed my search down too. But need help deciding!
Because watching movies and LISTENTING TO MUSIC , are my top priorities!!!
Need a good sounding laptop!

http://www.newegg.com/Product/Product.aspx?Item=N82E168...
DELL INSPIRION i15 r
Intel Core i3 380M(2.53GHz) 15.6" 4GB Memory DDR3 1333 640GB HDD 5400rpm DVD±R/RW Intel HD Graphics
$549.99



http://www.newegg.com/Product/Product.aspx?Item=N82E168...
lenovo IdeaPad Z560 (0914-4HU) NoteBook Intel Core i3 380M(2.53GHz) 15.6" 4GB Memory DDR3 1066 500GB HDD 5400rpm DVD±R/RW NVIDIA GeForce 310M
$599.99


http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Acer Aspire TimelineX AS5820T-6401 Notebook Intel Core i5 480M(2.66GHz) 15.6" 4GB Memory DDR3 1066 640GB HDD 5400rpm DVD Super Multi Intel HD Graphics
$629.99

Mind you guys, i am upgrading from a DELL DIMENSION 3000 DESKTOP. That is over 6 years old. it has a Pentium 4 2.8 ghz processor, 512mb of ddr2 ram... and worse of all no video card no sound card and 80 GIGS OF RAM LOL!!!

So any help would be greatly appreciated!!! Thanks again GUYS!!