If you wanted to go a little cheaper on the video card, u should just get a 5500 and one vga-to-dvi adapter, like the ones below. And you shouldnt really notice quality loss... u can get a second opinion if you want to.
And all the bad reviewers on the adapter bought it to convert a dvi to a vga. which it does not do. it converts a vga to a dvi. But if i were you i'd shop around a bit more.
And the reason the vid card is cheaper is because its not meant for gaming. I used to own one with dual screens. it worked great.