Is main function mandatory in glsl shaders?

I need a new graphics card, what should i get?

• I have a Dell Insperon zino HD with Windows 7. Im in love with the game Minecraft and i want to have a better experience with it. i like to add mods, not to cheat but to enhance the game. like glsl shaders and HD texture packs. my computer can handle the texture packs pretty well and yes i did use MCpatcher. i also have modloader and apiclient added to the file. but what i need is a new graphics card to handle all the graphic data. i love the amazing shaders people make and i want them to run flawlessly. Does anyone have any recommendation for what graphics card i should get for my specific computer (im not going to buy a new one)? i would like to stay around a price of $70 or less but im open to any and all suggestions no matter what the price. when you answer please type the full name of the card and its price if you know it. Thank You.

• Answer:

  The most expensive one you can afford: http://www.tomshardware.com/reviews/gaming-graphics-card-review,3107.html The thing is, that computer you have there uses a mobility graphics card: so you'd need to get a GPU for notebooks and expect to pay more for less performance.