graphics card upgrade for pentium 4 pc

Hi


Thanks in advance for any advice offered. My computer is dated but im not a heavy games player so it has done what I needed it to do up to now. I use it for the internet, my business accounts and football management games.

I cant play football manager 2009 on it and I would also like to play the new Blood Bowl game when it is released in the new year. Im not very knowledgeable with computers , but I would like to upgrade the graphics card, but im not sure what the processor will handle and if I will need to, or can change the power supply unit.

Any advice to upgrading the graphics card would be appreciated.

Intel pentium 4 processor cpu 2.40 ghz
512mb ram (im going to upgrade it to 2gig, if you could tell me if this will be ok or if my processor will handle more i would also be greatful)
Power supply unit 250w
pci-e slot
monitor - packard bell a727

If you could recommend to me a graphics card that my processor will handle and if I will need a new power supply unit, monitor etc or if there isnt much i can do about upgrades. I was looking at the Nvidea geforce 8500gt 1gb graphic card but i dont know if i can make it compatible.

Any help would be appreciated.

+1 for new system... upgrading such an old system isn't very rewarding, 'used money vs increased performance' ratio isn't that great...

E5200 $82.99
http://www.newegg.com/Product/Prod [...] 6819116072
ASUS P5K PRO P35 $102.99
http://www.newegg.com/Product/Prod [...] 6813131275
HD4670 $69.99 (with rebate)
http://www.newegg.com/Product/Prod [...] 6814121274
4GB DDR2 800 $59.99 (or 2gigs and save a little)
http://www.newegg.com/Product/Prod [...] 6820231148
Antec Sonata III $129.99
http://www.newegg.com/Product/Prod [...] 6811129024
WD 640GB $74.99
http://www.newegg.com/Product/Prod [...] 6822136218

total $520.94 with quick browsing, might be possible to shave off a little if spent some more time