Help with video card on HP D530 SFF

[ultima600]

Hi guys I have a HP D530 that looks like this:

http://www.pcarena.hu/pricelist/oriaskep/hp-d530-sff-338.jpg

the specs are:

-Intel Pentium 4 3 GHz
-1GB DDR RAM
-80GB hdd
-DVD/CD Writer Drive
-Intel 82865G 96MB video
-Onboard sound card
-Floppy drive
-10/100 network card
-4x RAM slots dual channel capable (2x free)
-2x PS/2 ports
-6x USB 2.0 ports (2x front, 4x back)
-2x PCI slots (both unused)
-1x AGP slot (half height) unused
-1x Serial port
-1x Parallel port

what is the best possible video card I could upgrade to? can someone give me a link? all help appriecated

 

[Concordedly]

What's the PSU on that? Power Supply Unit.

 

[daisymtc]

low profile AGP...
http://www.newegg.com/Product/Product.aspx?Item=N82E16814134072

 

[ultima600]

ECS N6200A-256DZ GeForce 6200 256MB 64-bit DDR2 AGP 8X Low Profile Ready Video Card

sounds good could someone give me a link to an online store that ships to New Zealand?