Should my PC run Oblivion?

[duncsharp]

i am having real trouble running oblivion on my pc - here are my details:

amd 3700+ san diego
1gb dual value geil ram (2.5 3 3 6) 1T
saphire x1800xt 256gb
onboard sound - asus A8-N SLI PREMIUM
500W ENERMAX LIBERTY

What setting should the game run confotably on
resolution?
AA?

any help would be great

thanks

duncan