hmm,which Video card to buy...?

DELL OptiPlex 990 MT Processor: Intel Core i7 procesor 2600 3.4GHz, 8MB Cache Chipset: Intel Q67 Express chipset

Memory: 4GB 1333MHz DDR3 Dual channel Non-ECC memory HDD: 1TB Serial-ATA III (7200 okr/min) DVDRW: 16x DVD±RW Dual-Layer drive Video: Intel HD Graphics 2000 Audio: High Definition Audio i internal speaker Networking: Intel Gigabit network adapter (10/100/1000Mbps) I/Oi: 1x PCI Express x16 slot 1x PCI Express x16 slot (wired x4) 1x PCI Express x1 slot 1x PCI slot I/O ports: back: 6x USB 2.0, 1x serial, 2x PS/2, 2x audio, front: 4x USB 2.0, 1x headphone, 1x microphone Casse: Mini Tower Keyboard: Dell USB keyboard Mouse: Dell USB laser mouse, 6 + scroll OS: Microsoft Windows 7 Professional 64-bit

Here u are mine computer specification.

Now I have GT450 video card,but I am not happy at all with her And I want buy new one about 100€.

please advise me which video card is best for me

thanks a lot my friends

teo