Old hardware, new card upgrade?

Hi,

Looking for a little advice guys. I can’t afford a full upgrade at the moment, but thanks to a friend, I have been given a new motherboard for free. It’s still only a skt754, but like I said, I can’t afford a full upgrade. My current system is as follows:

AMD64 3700+ Clawhammer
Asus K8Ne – Deluxe
Sapphire ATI 9800Pro
2x Western Digital 160Gb SATA
2Gb Crucial PC3200
Win XP Pro

The only change will be the motherboard to an Asus K8N4-e Deluxe, which will give me a PCIe slot instead of AGP. I am therefore looking to upgrade my graphics card, but don’t want to go high end if my current hardware will not allow me to take full advantage. If i chose the Geforce 8800GTX, would I see a decent increase over my current card, or am I overspending? I run my system at 1280x1024 and my main reason for upgrading is flightsim, so any decisions would be swayed by this.

Thanks
Mataus

OK, i'll scrap the GTX idea. I have seen the GTS 640mb for only a small amount more than the 320mb. As its only a small amount, would it be worth it? It would be nice to have the sliders turned up on games instead of been on low.

I'm also thinking of a card that will last me about 2 years and will be good for vista and a later system upgrade.

Thanks for the advice

mataus

Improvement is what i want. I understand i will be held back by my CPU, but thats something i'll have to cope with, prob till next year!!

From a realistic point of view, what would you recommend?

Thanks
Mataus

I will upgrade to vista within the nxt 12mnths, so i think the GTS640mb will be the choice.

Thanks for the help

Mataus