For sub $600 you are a bit limited, but you can still get something nice if you don't need a powerhouse. That style of keyboard is hard to find in that range. I would recommend a dedicated graphics card in lieu of intel HD graphics if you are going to watch movies (especially HD). My wife's laptop (2 year old sony vaio) has a hard time playing 720p and 1080p with integrated graphics (picture falls behind audio).
a couple of possibilities:http://www.newegg.com/Product/Product.aspx?Item=N82E16834127269
- has athlon and radeon graphics (little bit outdated though). http://www.newegg.com/Product/Product.aspx?Item=N82E16834127268
- black version of Sony.http://www.newegg.com/Product/Product.aspx?Item=N82E16834115862
- similar hardware to the sony, but Acer instead...http://www.newegg.com/Product/Product.aspx?Item=N82E16834115805
- $650, but newer i3 cpu and 5xxx series radeon graphics...
Im not sure if you want to get an older processor (core2 duo or athlon) they are a bit cheaper and can provide better performance in some cases than i3 and i5.
Good Luck in your search!