Windows 7 - laptop screens quality help

i am buying a laptop and an wonder what is the best screen for quality and crispness can you tell me the rang of best screens and what to look for in a screen for example samsung has SuperBright 300 nit Anti-reflective HD (1366 x 768) LED

The screen size depends on the usage of your computer. If you want to use for browsing, MSOffice etc. then a 14" or 15" screen is sufficient. If you watch lots of movies then better go for a screen larger than 17" with 16:9 aspect ratio.

The Screen quality depends on your budget. If you have good budget, go for full HD (1080i) resolution screens with LED backlit. The latest LED backlit screens provide brighter images with low power consumption. Otherwise you can go for a (720p) screen for low cost. It is better to get a matt finish screens which are antireflective rather than glossy finish.

so getting 1980by1080 resolution should be brilliant for watching dvd's and it should be better then 1366x768 resolution for watching movies and images

please i need your opinon

Yes as I have mentioned above 1980by1080 resolution on a >17" monitor is definitely better than 1366x768 resolution.
You will see more information in high resolution providing crisper, clear images and videos.

The High-Def Debate of 1080i vs. 720p

1080p vs. 1080i vs. 720p

Please read the above links and further information you can get by googling around.