A Good Graphics Card?

Just wondered if any of you could give me an opinion on a good but not extremely expensive graphics card I could get so fsx runs a lil smoother. Right now this is what I am working with.
Dell Insiron 530s
4GB Ram
160 GB hard drive
Vista basic
ATI Radeon 2400 HD 256mb graphics card
Intel (R) Pentium (R) Dual CPU E2180 @ 2.00 GHz 2.00 GHz
I'm lucky if i get 7 fps currently an the only thing I can think of is this graphics card just isn't cutting it. Its running very choppy, if i have Direct X 10 checked then some of my add on aircraft don't work right then if i check it off I lose the high cockpit resolution of my standard included aircraft.
Theres no reason I can think of that this simulator shouldn't be running smoothly other then the card. the system i think is more then able to handle fsx. So any feedback advice would be greatly appreciated! Thank You All!
Dell Insiron 530s
4GB Ram
160 GB hard drive
Vista basic
ATI Radeon 2400 HD 256mb graphics card
Intel (R) Pentium (R) Dual CPU E2180 @ 2.00 GHz 2.00 GHz
I'm lucky if i get 7 fps currently an the only thing I can think of is this graphics card just isn't cutting it. Its running very choppy, if i have Direct X 10 checked then some of my add on aircraft don't work right then if i check it off I lose the high cockpit resolution of my standard included aircraft.
Theres no reason I can think of that this simulator shouldn't be running smoothly other then the card. the system i think is more then able to handle fsx. So any feedback advice would be greatly appreciated! Thank You All!