Then get that monitor b1gapl has just suggested. Use your D-SUB for now until you're WANTING to upgrade it to DVI since that monitor has both adapters for either DVI or D-SUB.
My hanns-g has a dvi and vga (can use either one if i wanted to) however i don't know whats in your price range but theres usually a 22' at bestbuy for like 189 which is a really great deal. It was just this past week however i am sure they will have it again next week.
well i knew there was something on best buy this week so i looked it up on there website and heres is what one of there deals are...