Hi everyone.I have been used intel based systems.Now i made a decision that this time i will build a AMD based system.Especially, i use pc for
1.Games
2.HD or Bluray videos (1080p or whatever)
3.Photoshop
So i wanted to learn your advices about this system.
Components,
1.GIGABYTE GA-MA785GMT-UD2H or ASUS M4A785T-M Mainboard
2.AMD Phenom II X4 955 BE CPU
3.1 gb ATI Radeon 48xx, 57xx or 58xx Graphic card. (Advices?)
4.xxxxx 4 gb (2x2gb) 1333 MHZ Dual RAM kit (Advices?)
5.Western digital 750 GB or 1 TB 32 mb cache HDD
So now i'm asking my questions

..
1.)What do you think About The motherboards?I want to add a Graphic card, but it already has a onboard graphic card, so is there a possibility between them?(for example: speed or freezing problems or whatever.)
2.)Actually first i wanted to buy a ATI 4850 graphic card.But some people adviced me a 5xxx series graphic card.I havent understood the differences between 4xxx and 5xxx series cards.So please advice a card for me with the explanation.
Note: I dont have a good budget.so i think to use my old case for a while

until i earn some money.So please take into consideration this.I can maybe pay a little too.But not too much

.
So please give me general advices, motherboard and graphic card advices.Thanks already now.I'm sorry because of my bad english.Have a good work